Science test quizlet

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Which of the following is an example of homogeneous mixture?

Air

All elements are composed of extremely small particles called?

Atoms

Which of these statements is false? (Oxygen and copper are examples of elements, Elements are pure substances, Atoms of different elements can combine to form compounds, atoms of different elements are the same)

Atoms of different elements are the same

What characteristics listed do photosynthesis and combustion NOT share? (Both involve chemical change, Both are endothermic, both change energy from one form to another, both cause changes in matter)

Both are endothermic

One example of a chemical change?

Burning wood

What holds atoms together in a molecule?

Chemical bond

During photosynthesis, plants transform electromagnetic energy from the sun into?

Chemical energy

The form of energy stored in the bonds between atoms is called?

Chemical energy

A characteristic of a pure substance that describes its ability to change into a different substance is called?

Chemical property

If you describe methane as a gas that easily catches fire, you are describing a?

Chemical property

Which of the following is NOT a pure substance?

Chocolate chip cookie dough

Table sugar is an example of a?

Compound

One example of a physical change is?

Dissolving salt in water

Radio waves, visible light from the sun, infrared "rays" from heat lamps, the waves that heat food in a microwave oven, ultraviolet rays, and X-rays are all considered types of?

Electromagnetic Energy

Substances that cannot be broken down chemically by other substances are?

Elements

The change in which ice absorbs energy and melt is a?

Endothermic change

The ability to do work or cause change describes?

Energy

Fireworks exploding in the sky and giving off light is an example of a?

Exothermic change

A change that produces one or more new substances is called a PHYSICAL change. T or F?

False, Chemical

A substance that undergoes a CHEMICAL change is still the same substance after the change. T or F?

False, Physical

H20, C02, C12, H22, and O11 are all examples of chemical?

Formulas

A thermal energy always moves from?

From warmer to cooler

Which of the following is NOT an example of a physical change?

Gasoline burning in a car engine

Anything that has mass and takes up space is called?

Matter

Lemonade consists of several substances that are not chemically combined so lemonade is classified as a?

Mixture

Soil, a salad, and sugar water are all examples of?

Mixtures

Which of the following statements about the mixture is true?

Mixtures are usually easy to separate into their components

If you heat a liquid and measure the temperature at which it boils, you are measuring a?

Physical property

Table sugar, and table salt are examples of?

Pure substances

Which of the following is NOT a chemical change?

Salt dissolving in water

Which of the following is NOT an example of a chemical change? (Gas burning on a stove, rust forming on an iron fence, salt dissolving in a glass of water, using electricity to break down water into hydrogen and oxygen)

Salt dissolving in water

When matter changes the most common form of energy released or absorbed is?

Thermal energy

How do liquid water, ice, and water vapor all differ from each other?

They are different states of matter

A MIXTURE is made of two or more substances, elements, compounds, or both that are together in the same place but are not chemically combined. T or F?

True

A PURE substance is made of one kind of matter and has definite property. T or F?

True

The smallest particle of an element is called an atom. T or F?

True


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