Science Multiple Choice Test

Which objects could be combined to make a device that woul produce electricity?

Which animal species are most likely to survive in a marine environment that has very cold water temperatures?

Which of these represents a chemical change?

Which sentence describes a way that Earth's biodiversity helps human health?

Carrie tests the stream behind her house each year to find out if the water quality has changed. This year, the water in the stream had a pH of 6.0 according to the pH meter. What describes the pH of the water in the stream?

Hernando ran an electric current through a beaker of distilled water and separated the water into the gases H2 and O2. What type of change did he produce?

On the periodic table, chromium has the symbol Cr, an atomic number of 24, and a mass number of 52. How many protons does chromium have?

Which of the following would not be used to construct an electromagnet?

In what state of matter are the molecules far apart and constantly moving at high speeds?

The planets in our solar system stay in their orbits because of the __________.

Earth's atmosphere is made up of several gases. Which gas makes up over 75% of Earth's atmosphere?

Why does Earth have a greater gravitational pull than the Moon?

Several exploration vehicles have landed on Mars and have sent information back to scientists on Earth. Which characteristic changed after the vehicles landed on Mars?

Which statement describes a difference between a bar magnet and an electromagnet?

Rock pools form along ocean coasts and periodically beome isolated from the ocean, causing the salinity and acidity of the water in the pool to increase. What organisms are most likely to survive extended isolation in a rock pool?

Jules and Katie concluded that light objects fall at a much slower rate of speed than heavy objects. Their teacher told them their conclusion was incorrect. What kind of error did the students make to produce the incorrect conclusion?

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