Look at the chemical reaction for water. 2H2 + O2 → 2H2O How does combining hydrogen and oxygen to create water relate to the law of conservation of mass?

The same cylinder was used to calibrate a spring scale, which measures the weight of an object. The calibrated spring scale displays 350 grams based on Earth's gravity. What would this spring scale display under Jupiter's gravity?

Samantha is building an electric motor using a magnet and a length of thick wire. What shape must the wire have in order for her motor to work?

A team of astronomers observed two asteroids of equal mass traveling through our solar system. Which asteroid will be most attracted by Earth's gravity?

object could not be used to test an electromagnet to find out if it is working?

Which substance is a compound?

Which substance is not a natural component of Earth's atmosphere?

Which of the following has the largest magnetic field?

A substance with a pH of 2.3 is ________.

In which state of matter are molecules closest together with the least amount of movement and heat?

Which of these is an adaptive bioengineered product?

Which of the following will react to form a new compound when mixed?

Organisms that live in coastal areas must be able to survive living in both dry conditions with no water, as well as wet conditions while they are under water. Which traits would provide it with the best chance for long term survival?

The following chemical equation represents the decomposition of ammonia. 2NH3 -- 3H2 + N2 Which of the following is true in all chemical reactions that result in decomposition?

A substance with a pH of 9.2 is ________.

The mass of 5 cubic centimeters of aluminum is 13.5 grams. What is the density of aluminum?

Mr. Parsons is helping his science class build a device that will produce electricity with a rotating magnet. What else must be included in the device in order for it to produce electricity?

Heat was applied to 500 milliliters of water until the temperature of the water reached 100 °C. What change happened to the water when it reached 100 °C?

How is mass different from weight?

Which gas makes up about 20% of Earth's atmosphere?

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