Biodiversity
What does biodiversity mean?
Answer: The variety of living things in an ecosystem.
What is an electric circuit?
Answer: A complete path that allows electric current to flow.
What are the four forces of flight?
Answer: Lift, weight/gravity, thrust, and drag.
What force keeps planets orbiting the Sun?
Answer: Gravity.
What is an atom?
Answer: The tiny building block that makes up matter.
What is the difference between a habitat and an ecosystem?
Answer: A habitat is the place where an organism lives. An ecosystem includes all living and non-living things interacting in an area.
What is the difference between a conductor and an insulator?
Answer: A conductor allows electricity to flow easily. An insulator does not allow electricity to flow easily.
Which force pushes an airplane forward?
Answer: Thrust.
What causes day and night on Earth?
Answer: Earth rotates on its axis.
200: What are the three main particles in an atom?
Answer: Protons, neutrons, and electrons.
What is one example of a structural adaptation and one example of a behavioural adaptation?
Answer: Structural: thick fur, claws, beak shape. Behavioural: migration, hibernation, hunting in groups.
What is the difference between a series circuit and a parallel circuit?
Answer: In a series circuit, current has one path. In a parallel circuit, current has more than one path.
How does drag affect a flying object?
Answer: Drag slows the object down because it acts opposite to motion.
What causes seasons on Earth?
Answer: Earth’s tilted axis and revolution around the Sun.
Why is the nucleus of an atom very dense?
Answer: The nucleus contains protons and neutrons packed tightly into a very tiny space, so most of the atom’s mass is concentrated there.
Why are decomposers important for biodiversity?
Answer: Decomposers break down dead plants and animals, returning nutrients to the soil so plants and other organisms can survive.
Why are electrical wires covered with plastic or rubber?
Answer: Plastic and rubber are insulators, so they help prevent electric shock and keep the current inside the wire.
Why does a wing help produce lift?
Answer: The wing shape helps air move differently above and below the wing, creating an upward force.
Why do we see different phases of the Moon?
Answer: As the Moon orbits Earth, we see different amounts of its sunlit side.
What does the atomic number tell us about an element?
Answer: It tells the number of protons in the nucleus.
Why are pollinators important for biodiversity?
Answer: Pollinators help plants reproduce. Without them, many plants would decrease, affecting animals that depend on those plants.
What happens to the brightness of bulbs in a series circuit when more bulbs are added?
Answer: The bulbs usually become dimmer because the electrical energy is shared between more bulbs and resistance increases.
What does Bernoulli’s Principle explain about air pressure and fast-moving air?
Answer: Bernoulli’s Principle explains that fast-moving air has lower pressure, while slower-moving air has higher pressure.
Why do planets farther from the Sun take longer to complete one orbit?
Answer: They have larger orbits and travel a longer path around the Sun.
Why is an atom usually neutral?
Answer: It has the same number of protons and electrons.