Science Unit 1 Review

Science Unit 1 Review

by Sarah Blanton

Animals: Basic Needs

• ​The population of an animal depends on the availability of food, water, air and shelter.

• ​When predators increase, a population of prey will decrease.

• ​Populations of animals change over time. They can increase and decrease.

Multiple Choice

Which of the following is a TRUE statement about the increase in the population of squirrels?

• The population of squirrels can continue to increase forever.

• The population of squirrels always increases at about the same rate as their predators.

• The population of squirrels will never increase because it always stays the same.

• The population of squirrels will increase when there is an increase in food.

Multiple Choice

In a tropical rainforest, fruit tress provide shade and shelter to many insects and tropical birds. Over time, the population of fruit trees decreased. Which of the following MOST LIKELY was the result of the decrease in the fruit tree population?

• A decrease in the fruit tree population will result in an increase in the population of birds and insects because of the increase of habitat.

• A decrease in the fruit tree population will results in an increase of food for the birds and insects.

• A decrease in the fruit tree population will result in a decrease in population of birds and insects because of the loss of habitat.

• A decrease in the fruit tree population will result in a decrease in the number of birds and insects because of the increase of sunlight.

Multiple Choice

Monarch butterflies lay their eggs on the milkweed leaf. Which of the following BEST EXPLAINS why the adult butterfly lays its eggs on the leaves of the milkweed plant?

• Predators can see the eggs hidden among the leaves.

• The leaves provide food to keep the larvae alive and growing.

• The butterfly needs a flat surface to land on and lay its eggs.

• The larvae would be washed away by rain if they were on the stem.

​Animal Adaptations

​If you look at birds, you will notice a difference in their beaks. The differences are adaptations to the kinds of foods the birds eat. An adaptation is a body part or behavior that helps animals meet its needs in its environment. Seed eaters have thick, heavy beaks. Fruit eaters have short, stubby beaks. Insect eaters have sharp pointed beaks. Birds have beaks that help them adapt to get their food in their environment.

​Animal Variations

There are two types of Peppered Moths, one with light colored wings and the other with dark colored wings. A variation of a dark color on their wings was an advantage for the dark wing Peppered moths because they could camouflage among birch trees while the white winged moths were easily spotted by predators and eaten.

​​Animals of the same population can have different traits based on their adaptation that they have developed in their environment.

Multiple Choice

A population of foxes that live in the forest have red fur color. A few of the foxes in the population have developed a variation of dark grey stripes on their fur that helps the foxes hide among small shrubs. Which of the following best explains how this variation provides an advantage to the few foxes in the population?

• Dark grey stripes on their fur allows the fox to be hidden from predators.

• Dark grey stripes on their fur allows the fox to be easily seen by predators.

• Dark grey stripes on their fur allows the fox to run faster.

• Dark grey stripes on their fur allows the fox to see further.

Multiple Choice

Over time, frogs living in a pond developed the variation of having larger, webbed feet.  Which of the following best explains why it is an advantage for frogs to have larger, webbed feet?

• Larger, webbed feet have allowed frogs to be better at growing food.

• Larger, webbed feet have allowed frogs to swim better.

• Larger, webbed feet have allowed frogs to jump higher.

• Larger, webbed feet have allowed frogs to be better at running.

Multiple Choice

Which of the following is the BEST EXAMPLE of instinctive behavior of a mouse?

• Walking towards a cat on the ground.

• Hiding from a  predator.

• Moving toward a loud noise.

• Decreasing food storage during the winter.

Multiple Choice

The Arctic fox lives in the cold, snowy environment of the Arctic. It is a carnivore that usually feeds on small mammals. However, the Arctic fox is also a scavenger that will sometimes follow a polar bear and eat the remains of the bear's kill. How does being a scavenger MOST LIKELY help the Arctic fox survive?

• Being a scavenger provides the Arctic fox with different sources of food.

• Being a scavenger allows other animals to prey on small mammals.

• Being a scavenger sharpens the hunting skills of the Arctic fox.

• Being a scavenger scares away the predators of polar bears.

​Erosion: Causes and Prevention

Erosion is a process where natural forces like water, ice, wind, and gravity wear away rocks and soil. ​

​Preventing Erosion

​There are many methods that could be used to help prevent or stop erosion on steep slopes. Grass and shrubs are very effective at stopping soil erosion. This is primarily because plant roots tend to hold soil together, making it harder to erode. The leaves of the plants also help to reduce the speed of raindrops falling on the ground, making it harder for them to move the soil and erode it. Ornamental grass and low, spreading shrubs work best as they leave no areas of bare, or uncovered soil exposed to the elements. Planting more trees and shrubs binds the soil and helps in erosion control.

Soil Erosion | Types and Causes | Video for Kids - YouTube

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Multiple Choice

Which of the following BEST EXPLAINS how humans can adapt their behavior to prevent erosion on a hillside?

• Create a rain garden to conserve rain water on the hillside.

• Plant trees and shrubs along the hillside.

• Recycle trash found on the hillside.

• Remove all trees and grass on the hillside.

Recycling

​Schools often produce tremendous amounts of waste with instructional materials, used electronics and food. Teachers and students can work collaboratively to reduce the amount of waste produced. Getting students and teachers involved in a recycling program at school is good for the environment, educational and can be a lot of fun.

​Recycling

​​Recycling is a process of converting waste materials into new materials and objects. Educating others about the importance of recycling, provides the country with a path to a greener future. The most common types of materials that can be recycled are paper, metal, electronics and plastic. When schools separate paper from their other trash then the amount of waste that is sent to landfills can be dramatically reduced

Multiple Choice

Which of the following BEST EXPLAINS how students can help decrease the amount of waste from their school going into the landfill?

• Students can ask to work only on white paper instead of colored sheets of paper.

• Students can clean out their desks weekly.

• Students can start a recycling program to maximize the amount of materials that are being kept out of the landfill.

• Students can ask for plastic straws instead of  drinking directly from the juice or milk containers.

​Rain Gardens

​A rain garden is a shallow depression on land that collects the rainwater falling from roofs, patios, gutters and balconies. It is like a hole used for gathering rainwater and runs drains down into the soil. It enhances the growth of plant life.

Rain Gardens Explained in 2 minutes - YouTube

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Multiple Choice

Which of the following BEST EXPLAINS the benefits of having a rain garden at your house?

• Rain gardens increase rain clouds for increased precipitation.

• Rain gardens increase the amount of water that is being absorbed into the soil from the house's rain gutters.

• Rain gardens decrease the amount of water being absorbed into the soil from the house's rain gutters.

• Rain gardens provide an area to grow fruit and vegetables for the animals.