General Science (Grades 6-8) Flashcards
6 cards from real MAP practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 General Science (Grades 6-8) flashcards as text
What type of rock is formed when magma cools and solidifies?
Answer: Igneous
Igneous rock forms when magma (underground) or lava (on Earth's surface) cools and solidifies. The word 'igneous' comes from Latin for 'fire.'
What is the difference between weather and climate?
Answer: Weather is day-to-day atmospheric conditions; climate is the long-term pattern
Weather describes short-term atmospheric conditions (today's temperature, rain). Climate describes the long-term average weather patterns of a region over 30 or more years.
Which of the following best describes the process of natural selection?
Answer: Organisms with traits better suited to their environment are more likely to survive and reproduce
Natural selection is the process by which organisms with favorable traits for their environment are more likely to survive, reproduce, and pass those traits to offspring.
A wave has a frequency of 5 Hz and a wavelength of 4 meters. What is its wave speed?
Answer: 20 m/s
Wave speed = frequency times wavelength = 5 Hz times 4 m = 20 m/s.
What happens to the density of water when it freezes into ice?
Answer: Density decreases because ice forms an open crystalline structure
When water freezes, hydrogen bonds arrange water molecules into an open hexagonal lattice (ice crystal structure) that is less dense than liquid water — which is why ice floats.
Which of the following is an example of a renewable energy source?
Answer: Solar energy
Solar energy is renewable because it comes from the sun, which is an essentially inexhaustible natural resource. Coal and natural gas are fossil fuels (non-renewable).