Living Systems
This process allows plants to make their own food using sunlight.
What is photosynthesis?
The force that opposes motion between two surfaces.
What is friction?
The star at the center of our solar system.
What is the Sun?
A prediction based on observations and prior knowledge.
What is a hypothesis?
The layer of gases surrounding Earth.
What is the atmosphere?
These living parts of an ecosystem include plants, animals, fungi, and bacteria.
What are biotic factors?
Newton's Third Law states that for every action there is this.
What is an equal and opposite reaction?
The path a planet follows around the Sun.
orbit
Variables that are kept the same during an experiment.
What are controlled variables (constants)?
Trees help reduce erosion because their roots do this.
What is hold soil in place (or stabilize the soil)?
Organisms that break down dead plants and animals.
What are decomposers?
A stretched elastic band stores this type of energy.
What is elastic potential energy?
This has living quarters for astronauts, laboratories for experiments, and even a gym for exercise.
International Space Station
The variable that is intentionally changed.
What is the independent variable?
The process where water changes from liquid to gas.
What is evaporation?
A rabbit eats grass and a fox eats the rabbit. What type of relationship is this?
predator prey relationship
This force occurs when an object is pulled tight by a rope or cable.
What is tension?
human-made objects that are launched into space to orbit around Earth or other celestial bodies.
Artificial Satellites
Why do scientists repeat experiments?
What is to improve reliability and accuracy?
Climate change can impact agricultural practices such as
Explain one way plants are important to humans.
What is providing oxygen, food, medicine, or materials?
Name two renewable energy resources.
What are solar, wind, hydroelectric, geothermal, or biomass energy?
This planet is known for its prominent rings.
Saturn
A graph showing changes over time would most commonly be this type.
What is a line graph?
Geographical location factors that affect climate include