On a sunny morning, students standing in front of a store window noticed an image of themselves in the glass. Why did the students see their image in the glass?

Which of the following is a nonrenewable energy source?

Energy from the sun is distributed around Earth by -

(picture #12) Students condcuted an investigation to determine if unknown liquids were acids or bases. What was the independent variable in this investigation?

Chloroplasts are found only in organisms that are able to -

Laundry in clothes dryer often becomes charged with static electricity while drying. Which of these best explains why a clothes dryer often generates static electricity

Earth is different from the other planets in our soolar system because it -

which gas do animals need to carry out life processes?

It is important to protect air quality because

Which of the following is an example of potential energy?

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