FREE PHYSICAL SCIENCE AND STUDY GAMES ABOUT

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FREE PHYSICAL SCIENCE AND STUDY GAMES ABOUT

DESCRIBING MATTER EXAM QUESTIONS

Actual Qs and Ans Expert-Verified Explanation

This Exam contains:

-Guarantee passing score -24 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation

Question 1: Molecule

Answer:

A neutral particle made of two or more atoms joined by covalent bonds.

Question 2: Compound

Answer:

A pure substance made of two or more substances chemically combined.

Question 3: Atom

Answer:

The basic particles from which all substances are made.Question 4: What must you do in order to observe a chemical property of a substance?

Answer:

try to change the substance to another substance.

Question 5: Chemical Property

Answer:

A characteristic of a pure substance that describes its ability to change into a different substance.

Question 6: What information does a chemical formula tell you about a compound?

Answer:

A chemical formula shows the elements in the compound and the ratio of atoms.Question 7: A metal melts at 450C. Is this property of the metal classified as chemical or physical? Explain your choice.

Answer:

Melting point is a physical property because the metal is still the same substance, it is only changing form.

Question 8: Substance

Answer:

A single kind of matter that is pure and has a specific set of properties.

Question 9: Heterogeneous Mixture

Answer:

A mixture in which pure substances are unevenly distributer throughout the mixture.

Question 10: Element

Answer:

A pure substance that cannot be broken down into other substances by chemical or physical means.

Question 11: Mixture

Answer:

Two or more substances that are mixed together but not chemically combined.Question 12: what is the difference between physical properties and chemical properties?

Answer:

Physical properties can be observed without changing pure substances into other substances. Chemical properties can be observed only by changing pure substances intoother substances.

Question 13: Why is it correct to say that seawater is a mixture?

Answer:

Seawater is a mixture made up of salt, water, and many other substances.

Question 14: What is a molecule?

Answer:

A particle made up of two or more atoms held together by chemical bonds.Question 15: How does a heterogeneous mixture differ from a homogeneous mixture?

Answer:

You can see the different parts of a heterogeneous mixture, but substances in a homogeneous mixture are so thoroughly mixed that you cannot see them.

Question 16: Chemistry

Answer:

The study of the properties of matter and how matter changes.

Question 17: Solution

Answer:

A well-mixed mixture containing a solvent and at least one solute that has the same properties throughout.

Question 18: Chemical bond

Answer:

The force that holds atoms together.Question 19: Helium does not react with ant other substance. Is it accurate to say that helium has no chemical properties? Explain.

Answer:

No. The fact that helium does not react with any other substance is a chemical property because it describes helium's ability to change (or not change) into different substances.

Question 20: Homogeneous Mixture

Answer:

A mixture in which substances are evenly distributed throughout the mixture.

Question 21: Matter

Answer:

Anything that has mass and occupies space

Question 22: Chemical Formula

Answer:

A combination of symbols that represents the elements in a compound and their proportions.

Question 23: How are elements and compounds similar? How do they differ?

Answer:

Bothe elements and compounds are pure substances. While elements are not made of simpler substances, compounds are made up of two or more elements.

Question 24: Physical Property

Answer:

A characteristic of a pure substance that can be observed without changing it into anothee substance.