Answer:
Chemical properties of the alkali metals
Atoms of group 1 elements all have one electron in their outer shell. This means that the alkali metals all have similar chemical properties.
Reactions with water
The alkali metals react with water to produce a metal hydroxide and hydrogen. For example, sodium reacts with water:
Sodium + water → sodium hydroxide + hydrogen
2Na(s) + 2H2O(l) → 2NaOH(aq) + H2(g)
Sodium hydroxide is an alkali. It is a base that dissolves in water to form an alkaline solution. This solution:
has a pH greater than 7
turns universal indicator solution blue or purple
Hydrogen gas is also produced. With very reactive metals such as potassium, the energy of the reaction causes the hydrogen to burn as the reaction takes place.
Explanation:
Answer:
potassium reacts rigorously with cold water. potassium is a soft metal. we can predict that potassium is a highly reactive metal.
Explanation:
hope this helps
how do the inputs of MATTER become the outputs of MATTER in cellular
respiration?
Answer: The inputs, or reactants, of cellular respiration are glucose and oxygen. The outputs, or products, of cellular respiration are water, carbon dioxide
How many cells does one gram of yeast contain?
Answer:
20 billion cells
Explanation:
It is based on the assumption that there are 20 billion viable yeast cells per gram of dried yeast. While there are 20 billion cells, you'll find that many manufacturers will state other numbers on their products.
The number of cells that one gram of yeast contain is 12 billion cells.
What are yeast cells?Yeasts are found in soils and on plant surfaces all over the world, and they are particularly prevalent in sugary environments like flower nectar and fruits.
It is predicated on the idea that each gram of dry yeast contains 12 billion live yeast cells. Despite the fact that there are 12 billion cells, several manufacturers will list different quantities on their products.
As opposed to mushrooms, yeast is a fungus that develops as a single cell, according to Laura Rusche, an associate professor of biological sciences. Although there is just one cell in every yeast organism, these cells form multicellular colonies.
Therefore, Yeast has 12 billion cells per gram.
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Which of the following is most likely course the liquid in tube A to rise
Can someone help me :)
Answer:
C. magnetic field
Explanation:
Earth is like a giant magnet with a North and South Pole. However, the magnetic North and South Pole are not aligned with the Geographic North and South Pole. ... The blue lines show where the magnetic field dips into the Earth and the red lines show where the magnetic field emerges from the Earth.
Answer:
I think it would be C, since the north and south magnets attract. Magnetic field
occurs when iron, or another magnets, get toget her, so I‘d say it’s C.
This is a very important question I need it answered as soon as possible please........
is red sus?
Answer:
HAHAHAHAHAHAH
Explanation:
hmmmm is he acting up??
Which of these statements is true regarding the use of testimony on hair samples in courts today?
A.) Hair samples are replacing DNA as an easily available, go-to source for identifying suspects.
B.)Modern changes in the discipline mean that any police officer can provide testimony on hair samples.
C.) Hair samples are necessary for most convictions.
D.) There's solid research that should lead us to be skeptical of testimony based on hair samples.
Answer:
Answer:A
Explanation:
If the object shown has a mass of 80g, what is the density?
Answer:
C. 1.23 g/ml
Explanation:
[tex] Density = \frac{Mass}{Volume} [/tex]
Mass of rock = 80g
Volume of rock = final fluid volume - initial fluid volume
Volume of rock = 265 cm³ - 200 cm³ = 65 cm³
[tex] Density = \frac{80g}{65 cm^3} [/tex]
[tex] Density = 1.23 g/cm^3 [/tex]
1 cm³ = 1 ml
Therefore, density of the object = 1.23 g/ml
Under a microscope, a student observes a specimen containing a cell wall, nucleus, and chloroplasts.
Which of the following could the specimen being observed belong to?
Answer:
A plant cell b/c it has chloroplast
Explanation:
Chloroplast absorbs sunlight also known as light energy used for the process of photosynthesis.
The observed specimen containing a cell wall, nucleus, and chloroplasts is most likely to belong to a plant cell.
PLANT CELL:
A plant is an organism whose cells contain organelles called chloroplast, which harbors chlorophyll pigment. This feature enables them perform photosynthesis; a process that plants use to synthesize their food.Plant cells are eukaryotic in nature i.e. they contain a membrane-bound nucleus in their cells. In addition to these organelles, plant cells also possess a cellulose-embedded cell wall that strengthens the cell. Therefore, the observed specimen containing a cell wall, nucleus, and chloroplasts is most likely to belong to a plant cell.Learn more at: https://brainly.com/question/1894299?referrer=searchResults
what makes angiosperm more advance than gymnosperm
Answer& Explanation:
Angiosperm is more advanced due to the mechanism of protection it has since developed as opposed to its predecessor, gymnosperm. Angiosperms could be deemed the inventors of animal-mediated pollination or dispersal, whereas gymnosperms mostly depend on wind-mediated pollination (which is far more of a gamble than animal mediated).
1) Angiosperms seeds are enclosed in fruits, which increases the chances of dispersal by either wind, water, or animals. Animals can eat the fruit and disperse the seeds via feces or by brushing the fruit off of their fur coats new areas of the terrain.
2)The development of flowers. Flowers are especially important because depending on the flower it can attract a set species of animals in order for pollination to occur. That species of animal could only focus on those few flowers and would allow the female part of the flower to receive pollen (produced by the male part of the flower) from all over the place. This theory is also applicable to animal mediated fruit dispersal.
why is it important to understand the breakdown of water into its ions before learning about acidity
Which statement best describes why the population growth rate slows as population size approaches carrying capacity?
O reproduction increases
O predation rates decrease
evolution of traits decreases
competition for resources increases
Answer:
competition for resources increases
Explanation:
When an ecosystem reaches its carrying capacity, competition for scarce resources become more intense.
The result of this is that species will either begin to die, or migrate away from the ecosystem leading to a decrease in population growth
Do you know what an orgasim is?
Answer:
It is a living plant or animal, or a single celled orgasim...OOP organism. Just playing lol
Explanation:
The earth rotates on its axis in a counterclockwise direction once every 24 hours, deflecting anything traveling long distances on or above the surface. This is known a the Coriolis Effect. What impact could the Coriolis Effect have on weather patterns
Answer:
in the Southern Hemisphere, currents are deflected to the left. As a result, storm systems seem to rotate clockwise. Outside storm systems, the impact of the Coriolis effect helps define regular wind patterns around the globe. As warm air rises near the Equator, for instance, it flows toward the poles.
Explanation:
Answer:
Chance of a cyclone
Explanation:
When the human body perceives internal and external stimuli, it responds to maintain a stable internal environment. Which is NOT an
example of thermoregulation in the human body?
es )
A)
sweating when hot
B)
shivering when cold
conserving adipose tissue
D)
dilation/constriction of blood vessels
Answer:conserving adipose tissue
Explanation:im taking the test nd thats the right anwser ♀️
Describe the factors that influence the development and type of soil in a certain area.
Soil research has shown that soil profiles are influenced by five separate, yet interacting, factors: parent material, climate, topography, organisms, and time. Soil scientists call these the factors of soil formation
Answer:
Factors that determine a soil's characteristics include: the type of parent rock from which the soil forms, the climate in the area, the slope of the land, the type and amount of vegetation, and the length of time the rock has been weathering.
Explanation:
Edge2020
Where does a carnivore directly get its energy from?
Answer:
From their food, for example when a human eats ... let’s say a burger. It has meat, vegetables and other good things for your body to get it’s vitamin and energy
Explanation:
In the human body, is every organ a part of only one organ system? Or are some organs a part of two or more organ systems? A. Every organ is a part of only one organ system, which is necessary because organ systems work independently of one another. B. Every organ is a part of only one organ system, although organ systems often interact with one another. C. Some organs are a part of two or more organ systems. For example, the heart is a part of the circulatory and digestive systems. D.
C
[From ck12.org] "An organ can be part of more than one organ system. For example, the ovaries produce hormones, which makes them a part of the endocrine system; the ovaries also make eggs, which makes them a part of the reproductive system as well."
The chart shows the number of blue crabs, a commonly-eaten seafood, in a population sample in South Carolina. Using the phrase "in tow" means that this shows the number of crabs caught in nets per year. The information in the chart suggests that blue crabs are likely A) becoming extinct. B) being overfished. C) now in abundance after years of struggling. D) decreasing in number, but increasing in size.
Answer:
Your answer is: B) being overfished
Explanation:
Hope this helps you
Crown me as brainliest:)
I NEED HELP ASAP! (Picture is attacted) True or false answer. YOU DHA REAL ONE IF YOU HELP !
2. Salt in soil may affect plant growth.
Formal Hypothesis:
Answer:
if salt is present in the soil, then plants will not grow as tall
Explanation:
hypothesis' are just if ___ then ___ statements. it doesn't matter if it's correct, you just have to be confident. so, as long as you don't use probably, maybe, might, etc, and stick to the if __ then __ format, you should be good to go!
I WILL GIVE YOU BRAINLIEST!!!!
Part A
Which statement is a central idea of the text?
The scientific method is based on observations.
The scientific method is based on reading scientific journals.
Scientists generate guesses in the scientific method.
Variables are sometimes used in the scientific method.
Question 2
Part B
Which detail from the text best supports the answer in Part A?
Conditions change in different experiments.
Experiments produce evidence for scientific ideas.
Hypotheses are ideas about what might happen.
Scientists share their results in journals and papers.
Answer:
A, D
Explanation:
Why is Earth's outer core hotter than Earth's oceanic crust? Earth's oceanic crust is denser than Earth's outer core is. Earth's oceanic crust has lava flowing from the mantle. Earth's outer core has a composition of solid iron and nickel. Earth's outer core is deeper within Earth than oceanic crust is.
Answer: Earth's outer core is deeper within Earth than oceanic crust is.
Explanation:
The Earths outer core is is known as the third layer of the Earth. It is the only layer of the earth which is liquid. and it is majorly constituting of made metals iron and nickel, as well as little constituents of other substances. The Earths outer core is responsible for magnetic field on earth. And it is hotter than the oceanic crust because it is deeper within the earth than the oceanic crust.
The core -outer core and inner core- compose the third and deepest layer of the Earth. The Earth's outer core is hotter than Earth's oceanic crust because the Earth's outer core is deeper within Earth than oceanic crust is.
-------------------
The Earth is composed of three layers known as cortex, mantle, and core.
The outer layer is the cortex, while the core is the inner layer is the core, both of them composed mainly of iron and nickel.
The core can be divided into outer core and inner core.
Near the terrestrial core, the temperature might reach up to 3,500ºC, and solid materials in these areas melt and fuse.
When fusing, materials lose density, becoming lighter and ascending again to the surface, creating the ascending currents.
Differences in temperature and density produce convection currents. Warm melted materials from the bottom are lighter and can ascend, while cold materials from the surface are denser, so they tend to descend.
Convective currents contribute to the plates' movements over the mantle and keep the surface warm, making life possible.
The heat produced in the core is responsible for the electromagnetic field.
The Earth's outer core is hotter than Earth's oceanic crust because the Earth's outer core is deeper within Earth than oceanic crust is.
---------------------
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A developer wants to extend a golf course into a wetland. Outline
environmental arguments you could make against this plan.
Answer:
This is a wrong decision.
Explanation:
This decision is not right because by removing wetland means removal of habitat of millions of organisms living in that wetland. The advantages of wetland is more than golf course. Golf course is only used for sport purpose but wetland has a number of purposes i. e. it provides protection against floods which occurs due to climate change, absorb pollutants and enhances water quality.
define the terms related age an absolute age
Answer:
hope the answer helped you
Explanation:
absolute age(true age) The age of a geologic phenomenon measured in present Earth years, rather than its age relative to other geologic phenomena (compare relative age)
HELPP ASAP AND THANKSS!!
Answer: A and B
Explanation:
HELPPPP!!! HELPPPPP!! PLSSSS!! ASAPPPP
Use the information in the diagram and the passage to describe the relationship between latitude, solar energy, and climate in the three labeled zones
Explanation:
please mark as brainlist answers
If you wanted to observe a living organism-an amoeba, for example-which type of microscope would you use?
A. electron microscope
B. light microscope
C. either one
D. niether one
Answer:
compound light microscope
Explanation:
an amoeba is a microscopic unicellular protist
What types of carbon-based molecules are most often broken down to make ATP? Explain how ATP production differs depending on the type of carbon-based molecules that is broken down
Answer:
Carbohydrates. Depending on the carbon-based molecule broken down, the amount of ATP produced will be less or more.
Explanation:
PLS HELP : What is the purpose of apoptosis?
Check ALL that apply.
(4 Points)
to make sure it has enough water
eliminates unnecessary cells
removes unhealthy cells
takes out damaged cells