Science Final Review

Which of the following best describes autotrophs?

• Organisms that make their own food
• Organisms that eat other organisms
• Organisms that live in water
• Organisms that can fly

How do heterotrophs get their energy?

• By eating other organisms
• By making their own food
• By absorbing sunlight
• By drinking water

In osmosis, __________________ molecules move from areas of high concentration to areas of low concentration without using any energy from the cell.

• oxygen
• water
• carbon dioxide
• nitrogen

Diffusion always causes particles to move from a region of _____________ concentration to a region of ______________ concentration.

• high to low
• low to high
• weak to strong
• balanced to unbalanced

A student noticed that the leaves on their classroom plant looked droopy and were hanging down. What inference can they make?

• The plant needs more sunlight.
• The plant needs less miracle grow.
• The plant needs less water.
• The plant needs more water.

The graph below shows the results of an experiment in which a student measured her heart rate in beats per minute (bpm) before and after five minutes of exercise. The experiment was repeated three times, with two minutes of reset in between each trial. Which conclusion about heart rate can be supported by the data shown in the graph below?

• Exercise did not impact the heart rate
• Exercise made the heart rate decrease
• Exercise made the heart rate increase
• Exercise is not good for the heart

Four different living organisms are shown below. Which statement is true for all of the organisms shown?

• They all carry out photosynthesis.
• They are all producers.
• They all contain at least one cell.
• They are all consumers.

Which sequence represents increasing levels of organization in the human body?

• organ → organ system → cell → tissue
• organ → cell → organ system → tissue
• cell → tissue → organ → organ system
• cell → organ → tissue → organ system

The diagram below represents parts of a human organ system. Which pair correctly matches this human organ system with one of its main functions?

• respiratory system : transport nutrients to cells
• respiratory system : mechanical and chemical breakdown of food
• digestive system: transport nutrients to cells
• digestive system : mechanical and chemical breakdown of food

Which gas is transported by the circulatory system in humans and is used by cells during the process of cellular respiration?

• carbon dioxide
• nitrogen
• hydrogen
• oxygen