Which of these is most likely the result of a chemical reaction?

Which of these molecules is made up of only one element?

Prosthetic devices, such as robotic legs, help improve the quality of life for many individuals with physical limitations. Which type of technology best describes a prosthetic device?

A teacher gives a student an unidentified liquid in a beaker. Which statement can the student correctly make about the liquid without knowing any of its specific properties?

Water vapor, dust particles, oxygen, ozone, nitrogen, and argon are some of the materials that make up the atmosphere of Earth. Which element is found in trace amounts in the atmosphere of Earth?

Which statement best compares pure water and lemonade?

In which state of matter do the particles of a substance move at the slowest speed?

A functioning electromagnet causes

A bronchodilator is a type of medicine used by people with asthma. This type of medicine quickly relaxes tightened muscles around airways to allow air to flow through. This medecine is best described as

The atmosphere of Earth is a mixture of different gases. What are the two most abundant gases in Earth’s atmosphere?

NASA is developing a new deep-space telescope to replace the Hubble Space Telescope. Which will best help NASA determine whether the new telescope is an improvement over the Hubble Space Telescope?

Which combination of substances will produce a compound?

Which adaptation is most helpful to a plant living in an area with frequent periods of drought?

When current flows through a circuit, how do the properties of the circuit change?

Which number of a solution is neutral?

A student pours some cooking oil into a bottle that contains water. The student shakes the bottle. The combination of cooking oil and water is best described as

Which use of recent technology has had hazardous results on the environment?

Which of these best describes the effect the sun’s gravity has on the movement of planets in the solar system?

An orange juice company produces a new variety of orange juice by adding calcium citrate to the juice. The original orange juice had a pH of 3.88. The new orange juice has a pH of 4.18. Which statement best describes the change to the orange juice?

A substance with a pH of 9.2 is ________.

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