Science 8th grade Topics

Science 8th grade Topics

By INOCENCIA RAMIREZ

​Make their onw food. They transform the energy from the sun into food.

Producers

​Biology and Energy transfer/interactions

Consumers

Scavengers

Decomposers

​They need to eat other living things to obtain energy.

Organisms that eat dead animals and help clean big organic remains.

Organisms that break down organic material and allow nutrients to return to the soil again.

Multiple Choice

How are decomposers like consumers?

• They provide energy to producers.

• They must capture prey in order to survive.

• They can make their own energy from sunlight.

• They get their energy from producers or other consumers.

​What is the difference between food chain and food web?

​

Multiple Choice

This picture shows a food chain that can be found on a prairie.

How is the plant different from the snake?

• The plant is a consumer and the snake is a producer.

• The plant is an herbivore and the snake is a carnivore.

• The plant is a producer and the snake is a consumer.

• The plant is a carnivore and the snake is an herbivore.

Multiple Choice

This picture shows a food chain in the ocean.

How does the small fish get energy?

• by eating algae

• by eating the shark

• by eating a consumer

• by eating the sea lion

Multiple Choice

A food chain, like this one, shows how energy moves between living things.

? → rabbit → fox

Which living thing best completes the partial food chain?

• herbivore

• plant

• carnivore

• bird

Multiple Choice

What do all animals need for growth?

• carbon dioxide, nutrients, and sunlight

• carbon dioxide, food, and water

• oxygen, sunlight, and food

• oxygen, water, and food

Multiple Choice

Each organism has its own role in an ecosystem. Organisms can be producers, consumers, or decomposers. Which of these organisms can be classified as a decomposer?

Multiple Choice

All organisms must obtain energy from their environment. Every organism needs this energy in order to grow and reproduce. How do producers obtain energy?

• They extract chemical energy from decaying organic matter.

• They obtain energy by eating plants, bacteria, and algae.

• They capture energy from sunlight and manufacture their own food.

• They extract energy from the chemicals in soil, air, and water.

Multiple Choice

A student is identifying food chains in an ecosystem. Which of the following organisms might be a tertiary consumer?

• frog

• redwood tree

• great white shark

• athlete’s foot fungus

Cell: definition, functions and origin of cells

​Definition:

Eukaryotic and Prokaryotic cells

Eukaryotic and Prokaryotic cells