Food chain
food web
water cycle
carbon cycle
relationship
100

What is a producer in a food chain?

Producer is an organism that makes its own food using sunlight.For example,plants.


100

What is a food web?

A food web is made up of many food chains that are interwined ,each food chain on this web maybe share the same consumer and same producer.

100

The definition of water cycle 

The water cycle is the continuous movement of water through the environment, including evaporation, condensation, and precipitation.

100

What did photosynthesis produced?

lucose and oxygen

100

This two species fight for the same resource,what is this relation?

Competition

200

Which organism is always at the beginning of a food chain?

producer

200

True or False

In a food web, each organism usually has only one food source.

true


200

What is it called when water changes from liquid to gas?

evaporation

200

What three things are needed for photosynthesis to happen?

Sunlight,water and carbon dioxide

200

A remora fish attaches to a shark to get a free ride and leftover food. The shark is not affected.
What type of relationship is this?


commensalism

300

In the food chain,grass-rabbit-snake-hawk

What is the thirdly trophic level in this food chain.

snake

300

In a food web, what can happen if an animal has no natural predators?

If some animals  have no predators, it population will grow too much. This can trouble over hunting or overgrazing of its food sources, which can unbalance the entire ecosystem.

300

What happens during condensation?

Water vapor cools down and changes back into liquid, forming clouds.

300

In which part of the plant does photosynthesis mainly take place?

leaves.

300

A tapeworm lives inside a human  and absorbs its nutrients. What kind of relationship is this?

Parasitism
400

What happens to energy as it moves up the food chain

Less energy is available at each level.Because through each levele heat will lost.

400

What might happen in a food web if some species increase too much?

If one species increases too much, it may overuse its food source

causing that species to decrease. 

This can also affect predators and other organisms in this food web, possibly throwing the ecosystem out of balance.

400

What is the role of the sun in the water cycle

The sun provides energy that causes evaporation, starting the water cycle.

400

Describe how human activities affect the carbon cycle. (e.g., burning, deforestation)

  • Burning fossil fuels – This releases large amounts of CO₂ into the atmosphere.

  • Deforestation – Cutting down trees reduces the number of plants that can absorb CO₂ through photosynthesis.
    These activities increase the amount of carbon dioxide in the air, contributing to climate change.

400

Compare mutualism and commensalism

Each make an example

Mutualism:Both species benefit

example:Bee &Flowers/wood cooper and tree

Commensalism:One benifit,the other neither helped or harmed.

example:Bird&tree(bird made nest in tree)

500

Why are there usually fewer top predators than producers in an ecosystem

Because energy decreases at each level in the food chain.Energy gradually decrease.There is not enough to support a huge number of top predators.

500

What can happen if a top predator is removed from a food web?

Without predator,the prey will increase vastly and eat too much food.This can affect other species and unblance the ecosystem.

500

How does water return to the Earth’s surface after it condenses into clouds?

Through precipitation, such as rain, snow, sleet, or hail.

500

Describe two ways carbon is transferred between land and ocean.

Atmospheric exchange

Sedimentation  

500

In a forest, a bird eats insects off a deer’s back (helping both), a tick feeds on the deer’s blood (hurting the deer), and two birds fight over nesting space. Name each relationship.

birds&deer:mutualism

tick&deer:parasistism

two birds:competition