Which resource produces the cleanest energy?

coal
gasoline
oil
wind

Answer:

wind

Explanation:

wind is a natural and renewable resource

Answer: Wild is the cleanest one

plsss helppppppp will give you alot of pointss

A. The sound is being absorbed around the corners of the doorway.

B.

The sound is being diffracted around the corners of the doorway.

C.

The sound is being refracted around the corners of the doorway.



D.

The sound is being reflected around the corners of the doorway.

-Question 2 please help me! -ASAP-
Between years 1975-1980, did wolves or moose have a higher population growth?
(Choose your answer below)
(They are both equal)
(Wolves)
(moose)
What might have caused the spike (increase) of moose population in 1995?
(Choose your answer below)
(An increase in the wolf population)
(A Decrease in the wolf population)
(Slower birth rates)
What caused the moose population to decrease so quickly after 1995?
(The moose and the wolves where)
competing for the same food.
(Moose population reached)
its carrying capacity.
(Wolf population completely)
died out.

Which of the following objects will have the greatest change in motion?

here's the image

You can use this article to help you! I will mark branlist!!

1.What would happen if producers were removed from the food chain?

2. How would you describe an ecosystem?

3. What describes the relationship between a food chain and a food web?

4. What would most likely be the result of an invasive species entering an ecosystem?

5. Why are humans responsible for many invasive species?

6. What are the three main roles of an ecosystem?

7. What is the purpose of a decomposer in an ecosystem?



An ecosystem is made up of all the living and nonliving things in an area. The living parts include plants, animals and insects. The nonliving parts include water, rocks, soil and sand. Swamps,prairies, oceans and forests are all examples of ecosystems.There are usually many different kinds of life in a single ecosystem. A grassland ecosystem, for example, contains much more than just grass. It includes other plants, mammals, insects and earthworms. It also includes many tiny living things in the soil.Three Roles For Living Things Each living thing in an ecosystem has a role to play. The three main roles are producer, consumer and decomposer. Green plants are producers. They make their own food through a process called photosynthesis. Animals, including humans, are consumers. They eat, or consume, plants or other animals. By Encyclopaedia Britannica,
Bacteria and other living things that cause decay are decomposers. Decomposers break down the waste products and dead tissue of plants and animals. They return nutrients to the soil. These nutrients help new plants grow. Producers, consumers and decomposers depend on one another and provide nutrients for one another.This is called a food chain.Feeding Levels A food chain describes the order in which matter and energy move through the feeding levels of an ecosystem. The levels of a food chain are basically the same across all ecosystems. The first level is the producers. After that is the consumers. Sometimes consumers are further divided into primary consumers, secondary consumers and tertiary consumers. The final link in all food chains is the decomposers. The decomposers break down dead organisms and natural waste.The consumers at the top feeding level of a food chain are called top predators. They have no predators hunting and trying to eat them. Instead, their population size is controlled through competition. They have to compete with one another for food and other resources.Energy FlowThe main source of energy in almost all ecosystems is the sun's energy. As energy moves through the ecosystem, much of it is lost at each feeding level. Itescapes as heat. That is the main reason why few food chains have more than five feeding levels. Diagrams called energy pyramids are used to show the flow of energy from one feeding level to the next in a food chain. Most ecosystems have more than one food chain. Food chains overlap. They connect to form a food web.Recycling Nutrients Many nutrients are constantly cycling through an ecosystem. These include water, carbon and nitrogen. A nutrient is something that helps living things grow.Nutrients from soil enter into plant tissues. When consumers eat the plants, the nutrients enter the consumers' tissues. Consumers that are eaten transfer the nutrients on to the predator at the next feeding level. Consumers that are not eaten die and transfer nutrients in their decaying tissues to the decomposers that feed on them. The decomposers recycle these nutrients back into the ecosystem. They transfer the nutrients back into the soil and air, where the nutrients become available to producers.A Delicate Balance
an ecosystem's health depends on a delicate balance. This balance must exist between all of the members of the ecosystem, and their surrounding environment. If something disturbs the balance,the ecosystem and all its members might suffer. Natural things that can disturb ecosystems include a changing climate and natural disasters.Human activities that can disturb ecosystems include polluting and clearing land for farms or buildings.Humans also are responsible for many invasive species. An invasive species is a living thing that spreads through an ecosystem where it did not exist before. Invasive species can threaten the plants and animals that originally made up the ecosystem. For example, Burmese pythons were brought to Florida as pets. Some pythons escaped and began reproducing in the wild. Their skill at hunting has decreased the number of wood rats and storks in the area. This upset the balance of the natural ecosystem.

plz answer (8th grade science but don't have on here)

The students want to collect data on how the average kinetic energy of the liquid water molecules in the ice baths changes during the experiment. Which statement best describes a change to the ice bath experiment that will help the students collect this data? A Measure the water height in each ice bath throughout the experiment and compare the initial and final water heights. B Measure the water volume in each ice bath throughout the experiment and compare the initial and final water volumes. C Measure the size of each piece of ice in each ice bath throughout the experiment and compare the initial and final sizes of each piece of ice. D Measure the water temperature in each ice bath throughout the experiment and compare the initial and final water temperatures.

Make a claim about which types of rocks the law of crosscutting relationships involves. Summarize evidence to support your claim and explain your reasoning.

Two species of turtles in a pond use the same species of fish as their food. The struggle of the turtles to survive as they use the same limited resource is called?

no link need right answer

science not chemistry


20 points

What are the products of photosynthesis?
water and oxygen
glucose and oxygen
oxygen and water
carbon dioxide and water

plz answer (actually is 8th grade science)

How can living things be classified? What are the criteria?

Heyyy, please help, I only need the sentences for the words please. Thank uuu :)

Which is common to the life cycles of both flowering and non-flowering plants?

1. produce fruit
2. stay dormant
3.pollination
4.producing cones

WILL GIVE BRAINILEST HELP PLS I ONLY GOT 10 MINUTWS LEFT

A characteristic of this environment is very little precipitation, sometimes in the form of snow. Which environment is this describing? (2 points)

I NEED HELP PLS HURRY!
Element “R” has a half-life of 2 minutes. After 6 minutes, how much of a 100 g sample would remain?

-QUESTION 5-
Many tall trees grow in a forest. Only a few small plants grow underneath the trees. Why is this so?
A.The tall trees use all the soil
B.The tall trees use all of the oxygen
C.The tall trees block much of the sun
D.The tall trees give off too much carbon dioxide

Give one example of fast erosion and one example of slow erosion. Use complete sentences.


help me! :)

What is the relative humidity if the dry bulb temperature is 18 degrees C and the wet bulb temperature is 10 degrees C?

Plz answer I'm desperate

Question 3 (please help)
When a population grows past the ecosystems carrying capacity, what happens to the population?

A.Continues to grow

B. The population starts to die off

C.The population grows then finds a new carrying capacity

What are some possible ways these rocks were formed? Be sure to discuss all 3 rocks.
pls help me

no link need right answer

5 points

Explain why cold fusion has yet to be solved. Your answer should be 6 or more sentences long.

What are the different levels in the Linnaean classification system? Which is the broadest? Which is the most specific?

If the gas begins at the conditions described in Trial 1, determine the volume of the gas at STP.

Some baking soda and vinegar were weighed separately and the weights added together. The two substances are mixed and a chemical reaction occurred, producing carbon dioxide, sodium acetate, and water. When the three new substances are weighed and the weights total, which of the following will be true?


A. The original weight will be more because there was more mass.

B. The new weights will be more because there is more mass

C. The two weights will be equal, because the mass is the same.

D. The new weights will be more because there are more substances.

How does the number of chromosomes of the daughter cells compare in the two forms cellular reproduction

What is the product of 1.65 and 1.05 x 10-27

Enter your answer in the box using standard notation. Use an initial 0 and a decimal point as needed

PLEASE HELP ME!!
the pictures are down there

no link need right answer

science no chemistry