Chemistry First Partial . Part III

Which is the state of matter shown in this figure?

• Plasma

• Solid

• Liquid

• Gas

What do scientists call a summary of accepted facts of nature?

• scientific law

• scientific theory

• hypothesis

• existing knowledge

Which is a chemical property of copper?

• hast a boiling point of 2567°C

• Is a solid at room temperature

• Reacts in air to form a green layer

• Has the symbol Cu

Which of the following substances is an element?

• Iron

• Baking soda

• Salt

• Sugar

Which of the following series of scientific steps is most likely in the correct order?

• observation, hypothesis, experiment

• hypothesis, theory, experiment

• scientific law, experiment, theory

• observation, theory, experiment

Which is the type of separation technique being demonstrated in the figure?

• Chromatography

• Filtration

• Crystallization

• Distillation

Which is NOT a chemical change?

• a bar of iron rusts

• a piece of wood is burned

• an egg is cooked

• ingredients for a cake are stirred together

Organic chemistry involves the study of substances that contain oxygen.

• False

• True

If the distance covered by a car at constant speed varies for different intervals of time, then distance is a dependent variable.

• True

• False

If the distance covered by a car at constant speed varies for different intervals of time, then distance is a dependent variable.

• True

• False