Chelsea wants to know which brand of potting soil is most nutritious for plants. She decides to design an experiment to test different types of soil. Which of the following is an important step in designing her reliable experiment?

Which is a decomposer?

Which statement is true about how day and night occur on Earth?

Which helps to explain how global wind systems are formed?

There is energy stored inside the molecules of food that we eat. This energy is classified as

Doug wanted to find out what kind of food his dog preferred. If he designed an experiment to answer this question, what would the independent variable be?

A science class has studied the characteristics of different asteroids. Which is the best explanation for an asteroid with many craters?

The Moon is visible to us because the Moon

An organism that makes its own food from sunlight is called a(n)

A scientist observes the sunlight coming through pine trees and shining on a lake that is full of fish. Which of these elements are abiotic factors?

If Earth’s Moon were as far away from Earth as the Sun is,

In the amount of time that it takes Earth to orbit the Sun, how many times has the Moon orbited Earth?

The amount of time between a full Moon and a new Moon is about

Which object has elastic potential energy?

Which statement contradicts the law of conservation of energy?

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