Science G7 EOT Practice 1

Word Cloud

How do you feel before Exams time?

Multiple Choice

In an energy pyramid, approximately 10 percent of the energy available in one trophic level is transferred to the next level. Which statement helps explain why this occurs?

• Consumers eat both producers and other consumers

• Organisms use most of the avaiable energy to fuel their own life processes

• Predators eat more organisms in their own level than irganisms in other levels

• Producers exist in only the lowest of the pyramid

Multiple Choice

How might a lake suffering from eutrophication affect population of fish?

• The population will suffer due to decreases in oxygen and habitat loss

• The fish population will not be affected

• The size of population will waver

• The population will grow because of the extra nutrients

Multiple Choice

Which of the following describes "Law of conservation of Energy"?

• Energy can be created and destroyed, but only in specific circumstances.

• Energy is always lost completely when it is transferred between objects.

• Energy cannot be created nor destroyed; it can only be converted from one form to another.

• Energy can change forms, but the total amount of energy increases over time.

Multiple Choice

How does your body perform cellular respiration, and how is it related to playing in gym class?

• Cellular respiration breaks down proteins to produce energy, which your body uses to build muscle during gym activities.

• Cellular respiration breaks down sugars to produce ATP energy, which muscles need to perform activities in gym class.

• Cellular respiration turns oxygen into ATP, allowing you to breathe faster when you exercise.

• Cellular respiration only produces energy when you're resting, so it pauses during intense gym activities.

Multiple Choice

Which of the following describes the relationship between species fightinig for the same limited resources.

• Competitive

• Cooperative

• Predation

• Mutualism

Multiple Choice

The opposite diagram shows nitrogen cycle.
What is the function of the beacteria shown in the model?

• They prevent the nitrogen from harming the plants

• They remove the nitrogen from the soil

• They remove the oxygen from the soil

• They return the nitrogen to the system

Multiple Choice

Which of the following describe anything that restricts the population growth?

• Overpopulation

• Limiting factor

• Resources extraction

• Extinction

Multiple Choice

How do different organisms obtain energy?

• All organisms get energy directly from the Sun.

• Only plants get energy from the Sun, animals get energy by consuming other organisms.

• Organisms get energy by absorbing it from the air.

• Plants and animals both directly consume get energy by photosynthesis.

Multiple Choice

Which of the following describes how predation affects pika populations?

• It increases the population size of pikas.

• It has no effect on pika populations.

• It ensures pikas have more food resources.

• It limits the pika population size by controlling how many can survive

Multiple Choice

Which of the following defines fossil fuels?

• Formed when decomposing organisms were exposed to high pressure, high temperature, and bacteria over hundreds of millions of years.

• Form quickly from decomposing plants and animals in just a few years.

• Substances created by the breakdown of rocks under high pressure and temperature over a short period.

• Energy sources that are produced in laboratories using high pressure and high temperatures.