Science Flashcards
7 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 7 Science flashcards as text
A student tests whether fertilizer amount affects plant height. What is the independent variable?
Answer: Amount of fertilizer
The independent variable is the factor the experimenter deliberately changes, here the fertilizer amount.
Why should an experiment include multiple trials?
Answer: To increase reliability and reduce the effect of random errors
Repeating trials helps show results are consistent and not due to chance.
When baking soda and vinegar are mixed, bubbles form and the mixture gets colder. What does this show?
Answer: A chemical reaction that absorbs heat (endothermic)
Gas production signals a chemical reaction, and cooling means energy is absorbed, so it is endothermic.
In a sealed container, 10 g of reactants undergo a chemical reaction. What is the mass of the products?
Answer: 10 g
The law of conservation of mass states mass is neither created nor destroyed in a closed system.
Which of these is a physical change?
Answer: Ice melting
Melting changes only the state of water, not its chemical identity.
As thermal energy is added to a solid, what happens to its particles?
Answer: They move faster and spread apart
Adding thermal energy increases particle motion, which can lead to melting.
An engineering team designs a levee to reduce Missouri River flooding. What is the best way to evaluate competing designs?
Answer: Test models against criteria and constraints like cost, strength, and environmental impact
Engineering design compares solutions by testing them against defined criteria and constraints.