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Chiang Matter Unit concept cards
Terms in this set (31)
A change in size, shape, or state of matter
Something not proved but assumed for more investigation
How do you know when something is a solid?
A) It will hold its shape by itself
B) It cannot be seen easily
C) It takes the shape of its container
D) It has weight and takes up space
* A) It will hold its shape by itself
Anything that has mass or takes up space
A physical feature of matter is which of the following?
* B) shape
A reusable receptacle, such as a carton, jar, or can in which material is carried
Matter made up of two or more elements
Nelson put water in a paper cup and weighed it. Then he put the paper cup in the freezer. The water froze. He took the cup out of the freezer and weighed it again. What was the weight after the water froze?
A) it is unpredictable
B) It was the same
C) It was less
D) it was more
*B) it was the same
A scientific procedure that is done to make a discovery or test a hypothesis
Five grams of orange-drink mix are dissolved in 100 grams of water. What would you expect the mixture to weigh?
A) 95 grams
B) 100 grams
C) 105 grams
D) 500 grams
* C) 105 grams
Matter made up of only one kind of atom
A change in matter that results in one or more different kinds of matter forming
Which of the following is true about chemical reactions?
A) Chemical reactions between two substances are always easily reversible
B) When a solid and a liquid are combined, they always form a new solid
C) Changing one of the reactants in a chemical experiment could change the results
D) When vinegar is used in chemistry, a new gas is always released.
* C) Changing one of the reactants in a chemical experiment could change the results
Class of matter made up of elements and compounds
When evidence shows that ice had a physical change when left out in a warm room?
A) It is cold to the touch
B) It is hard and white
C) It is melted into water
D) It reacted with oxygen
* C) It is melted into water
Which will weigh the same after undergoing a change?
A) a toy house after one block is taken away
B) Vinegar and baking soda after some bubbles have formed over the rim of the container
C) Sugar dissolved in water and stirred with a plastic spoon
D) Salt water after more water is added to the container and stirred with a plastic spoon
* D) Salt water after more water is added to the container and stirred with a plastic spoon
Bread placed in a toaster turns brown and perhaps black. What caused this chemical change to take place?
A) The bread was heated and reacted with oxygen in the air
B) A certain amount of time had to pass
C) The bread was painted and dyed while in the toaster
D) The bread had to be taken out of the wrapper
*A) The bread was heated and reacted with oxygen in the air
A state of matter having definite shape and volume
How are fireworks examples of chemical reactions?
A) They are used for special occasions
B) They explode and give off a colored light
C) It is easy to reverse the explosion
D) They are shaped like cylinders
*B) They explode and give off a colored light
A state of matter having the ability to flow, having a definite volume, and not having a definite kshape
Why do people cook certain foods before eating them?
A) Cooking causes chemical and physical changes in food
B) Food has to be cooked before people can chew it
C) Food cannot be digested if it is raw
D) Food changes color when it is cooked and looks nicer
*A) Cooking causes chemical and physical changes in food
A state of matter that can expand indefinitely and completely fill its container
Turn from a liquid into a vapor
Which of these foods has been through a chemical change?
A) Carrots cut up for salad
B) Vinegar and oil mixed together
C) Juice and water stirred together
D) Sugar and cream boiled to make a sauce
*D) Sugar and cream boiled to make a sauce
When a solid substance mixes into a liquid and becomes included in it
The end result of a reaction
A substance that participated in a chemical reaction particularly at the start of a reaction
A reddish brown or yellow coating formed on iron or steel by oxidation
Why might reactions with burning be important to people?
A) There would be no food without burning
B) All medicines are made by burning something
C) Burning creates all the clean water there is
D) Burning of fuels supplies heat and light
*D) Burning of fuels supplies heat and light
A process that leads to the changing of one set of chemical substances to another substance
Energy that can be transferred though solid and/or fluid
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