Science Chapter 4 - Study

Lesson 4: _______________ is the process of breaking down waste and living things that have died. (Decomposer, Decay)

Decay

Lesson 1: A bee "dancing" to show other bees where flowers are.

One kind helping another.

Lesson 1: Give two examples of how living things benefit from living together.

1. Animals that live together may share jobs. 2. Some animals help protect their group from other animals that want to hurt them.

Lesson 1: List three ways in which living things might interact.

1. Some living things live in groups. 2. One living thing helps another kind of living thing. 3. Other living things help each other.

Lesson 2: In one food chain, ferrets eat prairie dogs. If each ferret eats 4 prairie dogs each month, how many prairie dogs would be eaten by 11 ferrets in one month? Show your work.

4 times 11 = 44 (4 x 11)

Lesson 4: Describe ways that living things and natural events can cause an environment to change.

A beaver's dam causes new wetland to grow. Hurricanes can change coastlines. They can knock down trees and wear sand away. Floods kills plants.

Lesson 3: Write a short paragraph that describes two kinds of birds competing for a resource they both need to survive.

A bower bird competes with other males to attract females to its nest.

Lesson 4: A person chops down trees to make space to build a house.

A living thing

Lesson 4: A beaver's dam floods an area.

A living thing.

Lesson 4: A drought causes many plants to die

A natural event

Lesson 4: A forest fire burns plants and trees

A natural event

Lesson 4: A hurricane knocks down trees

A natural event

Lesson 4: A volcano erupts and kills plants in an environment. (a living thing or a natural event)

A natural event

Lesson 3: Explain the pattern of change in the lemming population over time.

About every three years their population grows large. Now the lemmings have to compete for what they need. Some lemmings cannot find enough resources to live. Many of them leave. Now there are fewer lemmings.

Lesson 1: Read the three facts below. Then write a conclusion that is supported by the facts. Fact 1: Sometimes animals help others in their group. Fact 2: Sometimes one kind of animal helps another kind. Fact 3: Sometimes two kinds of animals help each other.

Animals interact with each other to help them survive. Animals are safer in a group than when they are alone.

Lesson 4: How do beavers change their environments?

Beavers build dams of sticks and mud. Water backs up behind the dam.

Lesson 2: Food chain: Sunlight -> Cattails -> crayfish -> Raccoon Who are the producers in this food chain?

Cattails and Crayfish

Lesson 2: Trace the transfer of energy through a food chain that includes raccoons, crayfish, cattails and sunlight.

Cattails plant then the crayfish eat the cattails. The cattail transfers its energy into the crayfish.

Lesson 4: Write three causes of environmental change.

Cause 1: A volcano kills plants Cause 2: A forest fire makes room for plants Cause 3: A hurricane knocks down trees.

Lesson 2: Food chain: Sunlight -> Cattails -> crayfish -> Raccoon Who are the consumers in this food chain?

Crayfish and Raccoon

Lesson 2: How does the loss of prairie dogs affect eagles and foxes?

Eagles and foxes also eat prairie dogs. Now they need to get their food energy from other animals.

Lesson 3: True or False: Animals do no not compete for mates.

False

Lesson 3: True or False: Prey often compete to get predators.

False

True or False: A tree helping a flower get light, the flower does not help or harm the tree.

False

Lesson 2: How did reducing the number of prairie dogs affect ferrets?

Ferrets eat prairie dogs. Reducing the number of prairie dogs means ferrets have less food.

Lesson 4: What kinds of animals can now live in the wetland habitat?

Fish, birds and other kinds of animals can live there.

Lesson 4: List natural events that can cause change in an environment.

Floods, fires, hurricanes and droughts.

Lesson 1: Members of a herd protecting each other.

Helping in groups.

Lesson 3: What do living things compete for?

Living things compete for light, food, water, living space, and other resources.

Lesson 1: Why do living things interact?

Living things interact with each other because it helps them to survive.

Lesson 4: Describe patterns of change involving Douglas fir and western hemlock trees.

Seeds from the hemlock cones fall on the decaying Douglas fir logs. The logs hold water and contain things young hemlock seedlings need to grow.

Lesson 1: How do yucca moths and yucca plants help each other?

The moth gives the yucca plant pollen from another yucca plant. The yucca plant gives the moth a place to live. It also gives the moth food for its young. The moth lays eggs in the yucca plant.

Lesson 4: Explain how fire is a change that can improve growing conditions.

The plants that do not burn now have more space. Also, the ash from fires helps plants to grow.

Lesson 3: What kind of living thing usually survives in a competition?

The winners of competition survive.

Lesson 4: What happens to animals who can't live in the new wetland?

They have to find new homes or they may die.

Lesson 3: Why do living things compete with one another?

They want to survive. They compete for resources and for mates.

Lesson 1: True or False: A moth pollinating a yucca plant and laying its eggs in the plant.

True

Lesson 1: True or False: A prairie dog whistling to warn its group of predators.

True

Lesson 1: True or False: a bee getting food when it pollinates a flower.

True

Lesson 3: True or False: Animals that are good predators pass those traits to their young.

True

Lesson 3: True or False: Competition between animals sometimes follows cycles.

True

Lesson 3: True or False: Living things compete for many kinds of resources

True

Lesson 3: True or False: Some living things compete for oxygen.

True

Lesson 3: True or False: Sometimes people and animals compete for space.

True

True or False: Barnacles living on whales, the whales are not helped or harmed.

True

Lesson 1: A cleaner fish getting food when it cleans a larger fish.

Two kinds helping each other.

Lesson 4: What kind of new habitat grows around a beaver dam?

Wetland habitat

Lesson 2: Draw Conclusions: Tell what happens when a food chain is broken.

When a food chain is broken, animals have less to eat.

Lesson 2: a consumer that eats only animals

carnivore

Lesson 3: When two or more living things need the same resources, they are in _________________ with one another. (cooperation, competition)

competition

Lesson 2: Food chain: Sunlight -> Cattails -> crayfish -> Raccoon Do you think the raccoon is the end of this food chain? Explain.

Yes, because nothing is eating the Raccoon.

Lesson 2: a consumer that eats only plants.

herbivore

Lesson 2: a consumer that hunts for food.

predator

Lesson 2: a consumer that eats both plants and animals.

omnivore

Lesson 2: any animal that is hunted by others for food.

prey

Lesson 2: A living thing that makes food

producer

Lesson 2: Food chain: Sunlight -> Cattails -> crayfish -> Raccoon Where does the energy begin in this food chain?

sunlight

Lesson 2: A living thing that eats food.

consumer.

Lesson 4: A living thing that breaks down waste and living things have died is a __________________. (decomposer, decay)

decomposer

Lesson 2: Food chains and food webs show how ___________ moves between living things. (water, energy)

energy