Weather
What tool measures air pressure?
What is a barometer?
What is the main greenhouse gas released by burning fossil fuels?
What is carbon dioxide?
What are the three common states of matter?
What are solid, liquid, and gas?
What is the basic unit of life?
What is a cell?
Which organ sends signals to the body using nerves?
What is the brain?
Which type of front brings thunderstorms followed by cooler air?
What is a cold front?
What is the difference between weather and climate?
Weather is short-term; climate is long-term.
What is a physical change? Give an example.
A change in state or appearance; e.g., melting ice.
What structure controls what enters and leaves a cell?
What is the cell membrane?
What part of the eye detects light?
What are the photoreceptors in the retina?
What causes wind to form?
What is the uneven heating of Earth’s surface?
Name one piece of evidence that Earth’s climate is changing.
Rising global temperatures, melting glaciers, or sea level rise.
What is a chemical reaction?
A process where substances change into new substances.
What part of the cell turns food into energy?
What is the mitochondrion?
What two things are needed for cellular respiration?
Glucose and oxygen
How does the jet stream affect weather in North America?
It moves air masses and weather systems west to east.
How do human activities increase the greenhouse effect?
By releasing greenhouse gases like CO₂ from factories and cars.
How can you tell a chemical reaction has occurred?
Color change, temperature change, gas production, or formation of a solid.
How are plant and animal cells different?
Plants have cell walls and chloroplasts.
Describe the path a signal takes from a stimulus to a response.
Stimulus → receptor → brain/spinal cord → effector/response.
Explain how cloud formation is related to air pressure and humidity.
Rising air cools and condenses when pressure decreases and humidity is high.
Describe how climate change can affect ecosystems.
It can shift species ranges, affect food chains, and cause habitat loss.
In a chemical reaction, what must always stay the same before and after?
The number of atoms; law of conservation of mass.
Why do intestinal cells have so many mitochondria?
Because they need energy for active transport during absorption.
Explain how the digestive and respiratory systems work together to support metabolism.
Digestive system breaks down food for glucose, respiratory system brings in oxygen—both are used in cellular respiration.