grade 5 science midterm worksheet part 2

The kudzu vine was introduced to this country in the late 1800s. Today, it can be found in many Southern states. Kudzu eventually kills other plants it covers because it blocks out sunlight. Kudzu has been reported to grow roughly 1 ft per day. What can you conclude from this information?

• Kudzu is an invasive species that can change an ecosystem.

• Kudzu is an illustration of a predator-prey relationship in a community.

• Kudzu is an example of a cyclic change where the forest land will eventually be restored.

• Kudzu is an example of a pollutant that is destroying forest ecosystems in the southern United States.

In which of these ways would doubling a region’s human population most likely change the environment?

• People will destroy more habitat by building homes and buildings.

• People will protect more organisms than they did before the increase.

• People will set aside more land for conserving endangered organisms.

• People will use fewer resources that other organisms also need for survival.

Environmental changes happen all the time. Some of these changes are easy to spot. For example, the figure below shows a sign that you might see while riding along a road in many places.

What can you conclude about environmental changes after seeing this sign?

• Changes in the environment happen in cycles.

• The only changes to the environment happen naturally.

• Humans can change the environment by destroying habitat.

• Any change made to the environment will lead to species extinction.

What is the process that plants use to produce food?

• carbon dioxide

• photosynthesis

• chloroplast

• sunlight

This producer uses a molecule called chlorophyll.

Which need does chlorophyll help to meet?

• making food

• releasing oxygen

• absorbing soil nutrients

• taking in carbon dioxide

Which type of organism makes its own food?

• consumer

• decomposer

• producer

• scavenger

What does a food web show?

• how predators catch prey

• what food organisms eat

• why organisms find food

• when organisms seek food

Which kind of diagram shows how much energy passes along as one organism consumes another?

• decomposition

• energy pyramid

• food chain

• food web

Which of these shows the flow of energy in a food chain?

• decomposers  consumers  plants  producers

• sun  consumers  producers  decomposers

• producers  predators  decomposers  consumers

• sun  producers  consumers  decomposers

The picture below shows a food chain. The arrows show how energy flows from one living thing to the next.

In this food chain, what would be a possible energy source for the bacteria?

• all the animals

• all the organisms

• only the hawk

• only the predators