Science test quizlet
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
