Science Quiz Practice

In the process of ​ ​ (a)   , plants capture energy from ​ (b)   Plants use this energy to combine ​ (c)   and water. The products are food for the plant in the form of ​ (d)   , as well as ​ (e)   , as a waste gas.

• photosynthesis
• sunlight.
• carbon dioxide
• glucose
• oxygen

What are two main reasons that all plants and animals need food? Select the correct answer that has the two correct answers.

• to obtain energy for bodily functions and for growth and repair.

• to release energy into the environment and to be part of the food chain.

• to pass energy to other organisms and to be part of the food chain

• to pass energy and release energy into the environment.

What is the main role of decomposers in maintaining an ecosystem?

• They break down plant and animal remains and recycle the materials.

• They provide food for other organisms in a food web.

• They take in the energy of sunlight.

• They prey on small organisms in the soil.

Match the following. Which adds oxygen and which removes oxygen?

• removes oxygen

• burning fossil fuels

• adds oxygen

• photosynthesis

• removes oxygen

• life activities of animals

• removes oxygen

• burning wood and other plant matter

Matter ​ (a)   through an ecosystem. Producers are eaten by ​ (b)   , which are eaten by ​ (c)   . The remains of dead organisms are broken down by ​ (d)   that return the material to the soil.

• cycles
• primary consumers
• secondary consumers
• decomposers

Match each organism to its correct role in the food web.

• producer

• hawk

• primary consumer

• frog

• secondary consumer

• mouse

• final consumer

• grass

In any food web, what is the source of food energy for all the organisms?

• the sun

• green plants

• primary consumers

• decomposers

Which statement is true about a turtle's energy source is true?

• A turtle relies indirectly on the sun as an energy source.

• A turtle performs photosynthesis to gain its energy.

• Nutrients in the water are the ultimate source of energy for a turtle.

How does energy transfer in a food chain?

Drag and drop each step into the correct order.

• Energy in food is passed to the secondary and tertiary consumers.

• A primary consumer eats the producer.

• Energy in food reaches a top consumer that is not normally eaten.

• Producers make their own food using energy from the sun.