In which situation is a chemical reaction not taking place?
A. salt dissolving in water
B. rusting of an old car in a junk yard
C. burning gasoline in a car
salt dissolving in water (A)
Anna takes some apples and makes the changes as described in the list.
Which process(es) will lead to a chemical change only?
A. 1 only
B. 3 only
C. 2 and 4
D. 1 and 2
3 only (B)
Name three birds that cannot fly
Penguin, Kiwi, Ostrich
How many bones are in a shark?
None!
Which is the best example of a chemical change?
A. bonfire
B. chopping wood
C. crushing a can
Bonfire (A)
A student watches a burning candle and writes down her observations. Which observation represents a chemical change?
A. The candle wax melts.
B. The candle wick burns with a flickering flame.
C. The hot wax flows down the candle and later hardens.
Candle wick burns with a flickering flame (B)
What is the only animal that can't jump?
Elephant
What kind of bird can fly backwards?
Hummingbird
____________ can be observed without changing matter.
A. Physical Properties
B. Chemical Properties
C. Chemical Changes
Physical properties (A)
Terry is performing experiments using paper.
Which experiment resulted in a chemical change?
A. drawn on with crayon
B. burned
C. placed in water
Burned (B)
How many hours are there in one week?
168
What is the hardest substance in our body?
Tooth enamel
The diagram shows what happens when oil and an antacid tablet are added to a glass of water.
Which statement is true?
A. Both glasses A and B show physical changes.
B. Both glasses A and B show chemical changes.
C. Glass A shows a physical change, and glass B shows a chemical change.
D. Glass A shows a chemical change, and glass B shows a physical change.
Glass A shows a physical change, and glass B shows a chemical change (C)
Which pair of substances when mixed together form a new substance that has different properties than the orignal substance?
A. salt + water
B. sugar + water
C. vinegar + baking soda
Vinegar + baking soda (C)
How many eyes does a scorpion have?
between 6-12
Which country produces the most coffee in the world?
Brazil
A student mixes two clear liquids and finds that they turn blue when combined. What type of change did the student observe?
A. change in color
B. change in shape
C. change in size
D. change in texture
Change in color
A student adds a solid to a liquid. What would indicate that a chemical change has occurred?
A. The solid produces gas bubbles.
B. The solid expands.
C. The solid floats to the top.
Solid produces gas bubbles (A)
Which is the longest river in the USA?
The Mississippi
What is the philtrum?
Little grove above your top lip, under your nose