8th Grade LEAP 2025 Science Review

What is the difference between conduction and convection?

• Conduction is heat transfer through direct contact, while convection is heat transfer through fluid movement.

• Conduction occurs in gases, while convection occurs in solids.

• Conduction requires a medium, while convection does not.

• Conduction is the transfer of heat through radiation, while convection is through direct contact.

Why are advantageous traits likely to be passed onto offspring?

• Because organisms with those traits are more likely to survive and reproduce.

• Because all traits are passed onto offspring regardless of their advantages.

• Because advantageous traits are always dominant over recessive traits.

• Because offspring inherit traits randomly without regard to their advantages.

What is natural selection?

• Natural selection is the process where organisms better adapted to their environment tend to survive and produce more offspring.

• Natural selection is the method by which species are created through artificial breeding.

• Natural selection is the phenomenon where all organisms have an equal chance of survival regardless of their traits.

• Natural selection is the process of organisms changing their traits in response to environmental pressures.

Which organism has been around for the shortest amount of time?

• Dinosaurs

• Mammals

• Reptiles

• Humans

Where do earthquakes most commonly occur?

• In the center of tectonic plates.

• Along plate boundaries.

• In ocean trenches.

• At the poles.

What is the role of fossils in understanding Earth's history?

• Fossils provide evidence of past life and help scientists understand the evolution of species.

• Fossils are used to date rocks and determine their age.

• Fossils are primarily used for creating art and decoration.

• Fossils help in predicting future climate changes.

What is the definition of radiation in terms of heat transfer?

• Radiation is the transfer of heat through electromagnetic waves.

• Radiation is the transfer of heat through direct contact.

• Radiation is the transfer of heat through convection currents.

• Radiation is the transfer of heat through solid materials.

What is heat transfer by light called?

• Conduction

• Convection

• Radiation

• Insulation

What are plate boundaries?

• Plate boundaries are the edges where two tectonic plates meet, often leading to earthquakes.

• Plate boundaries are regions where tectonic plates are formed and destroyed.

• Plate boundaries are areas where tectonic plates float on the Earth's surface.

• Plate boundaries are the locations of volcanic eruptions only.

What are tectonic plates?

• Large sections of the Earth's atmosphere that move and interact with each other.

• Large sections of the Earth's lithosphere that move and interact with each other.

• Small fragments of the Earth's crust that remain stationary.

• Layers of water that cover the Earth's surface.