Unit 1 Assessment Review-Life Science

People can change the environment. Sometimes those changes are harmful, while other times they are helpful. What is one change that is helpful to the environment?

• Planting trees
• Dumping garbage in the ocean
• Building factories
• Cutting down trees to build homes

Crayfish begin life as eggs. The eggs hatch and the young cling to their mother. After some time, the young let go and swim away. They eat; they molt; they grow up. Eventually many will lay their own eggs.
This is an example of-

• A habitat
• a life cycle
• A food chain
• An adventure

Living organisms survive in environments which provide for their basic needs. All living organisms need-

• food, water, light, money
• food, clothing, shelter, water
• food, water air, space
• water, space, shelter, fun

A flash flood destroyed almost all of a forest. Some animals that live there have moved somewhere else. Why would the animals have to move somewhere else after the flood?

• They can't swim
• They don't have air
• They lost their water supply
• They lost their homes

Look at this food chain-
What will happen if all of the grass dies?

• The grasshopper will learn to eat snakes
• The snakes will lay more eggs
• The grasshoppers will move away
• There will be more grass

Populations of fish, frogs, geese, and turtles can be found living near or in a pond. Together, these populations make up a-

• habitat
• community
• enviornment
• species

Where could you find these animals if it has warm temperatures all year, a dry winter, and a rainy summer season?

• African savannah
• Arctic tundra
• Mountains
• Desert

Which is a learned behavior a snail could have learned?

• Gliding along on a strong foot
• Having a hard shell
• Pulling their bodies into their shell
• Hiding under a clay pot

A plant has wide, shallow roots that allow them to take water in quickly. These plants adapted to living in areas where there is not much rain, such as-

• A rain forest
• the desert
• the mountains
• grasslands

These two pictures show the same area after a major event occurred. What could have caused the difference in the forest?

• An earthquake
• Lighting caused a fire
• Beavers built a dam
• Animals moved there