4.LS.2.4 and 2.5

1. 1. The table shows typical temperatures in a gray wolf habitat.

2. Which of these best describes a way that gray wolves adapt to survive the changing temperatures?

• Wolves develop a heavy coat in the fall and shed it in the spring.

• B. Each wolf’s howl sounds different from the others.

• A wolf pack works together to find food in the fall.

• Wolves are most active at sunrise and sunset.

2. 2. A beaver is a mammal that builds its home in a stream or river. The beaver’s home is called a lodge. The beaver builds the lodge in the middle of a pond it creates by building dams in the stream. The picture shows a model of a stream ecosystem with two beaver dams and a beaver lodge. Based on the model, what would most likely happen to the ecosystem if the beavers and their dams were removed?

• The trees would have more water to use as the stream water moves more slowly through the ecosystem.

• The stream would be wider and deeper as the stream water moves more slowly through the ecosystem.

• . The banks of the stream would have less erosion as the stream water moves more quickly through the ecosystem.

• The water used by plants on the banks of the stream would be reduced as the stream water moves more quickly through the ecosystem.

Tags

NGSS.MS-LS2-3

NGSS.MS-LS2-4

3. An area with many different types of plants is experiencing a drought. The table shows rainfall for four years. Scientists predict that the rainfall pattern will continue during a fifth year. Which two types of plants will have the best chance of surviving in these conditions?

• plants with stems that store water and plants with large colorful flowers

• plants with large colorful flowers and plants with sharp thorns

• plants with sharp thorns and plants with long root systems

• plants with long root systems and plants with stems that store water

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

The cards list information about some animals. Which animals compete for the most food?

• Egret and Turtle

• Beaver and Egret

• Frog and Beaver

• Turtle and Frog

Tags

NGSS.MS-LS2-1

Water chestnut is a plant that grows in ponds. The leaves float on the surface of the water. Water chestnut leaves grow fast and can cover the entire surface of the pond. This blocks sunlight from reaching other organisms in the pond. The picture shows some parts of a water chestnut plant. When water chestnuts begin to grow in a pond for the first time, which change will most likely result?

• More fish will live in the pond.

• Fewer insects will visit the pond.

• Populations of other plants in the pond will decrease.

• Populations of different fish will come to live in the pond.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

The picture shows a food chain. What will most likely happen if the grass in this environment disappears?

• The number of rabbits will increase because there will be more foxes to eat.

• The number of foxes will increase because there will be more rabbits to eat.

• The number of foxes will decrease because they will run out of grass to eat.

• The number of rabbits will decrease because they will run out of grass to eat.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

White oak forests are an important habitat for animals.. Humans are removing white oak forests for timber. The graph shows the change in area of white oak forests. What will most likely happen if the white oaks continue to be removed?

• The forest animal populations will decrease due to a lack of food and shelter. 

• The forest animal populations will increase due to a lack of food and shelter. 

• 
  The forest animal populations will increase due to an increase in food and shelter. 

• 
  The forest animal populations will decrease due to an increase of food and shelter. 

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

The table lists what organisms eat in an ecosystem. What two things would happen if wolves left the ecosystem? 

• 
  There would be fewer elk.

• 
  There would be more deer. 

• There would be more trees. 

• 
  There would be fewer bison. 

• There would be less grasses. 

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

Sugarcane fields are being destroyed by rats. To solve this problem, the mongoose was introduced into the environment. A mongoose is a mammal that eats rats and snakes. 

What sentence below describes the most likely effect of introducing the mongoose to the sugarcane fields?

• The sugarcane crops decreased and the rat population increased. 

• The sugarcane crops decreased and the snake population increased. 

• The sugarcane crops increased and the rat population decreased. 

• The sugarcane crops decreased and the snake population decreased.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-2

The picture shows a model of an ecosystem. Which scenario would have the greatest effect on the organisms in this ecosystem?

• More birds begin to migrate into the area.

• Fish lay more eggs in the underwater plants.

• 
  A tree in the ecosystem dies and begins to rot.

• Water in the pond of the ecosystem dries up.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4