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15
×
Why does a straw appear bent when placed in water?
Optical illusion
Light changes speed and direction
The straw is flexible
The water warps the straw
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15
×
What is distillation?
Transparent mixture
Used to separate mixtures by boiling point
Light bouncing off a surface
Detects elements by their fluorescent signature
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15
×
Why does a prism show a rainbow when light passes through it?
Due to light refraction and dispersion
Due to chemical reactions
Because of mirror reflection
Because of magnetic waves
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15
×
What are two common ways mixtures can be separated?
Filtration and distillation
Boiling and condensing
Melting and freezing
Evaporation and combustion
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15
×
A compound has different __________ than the elements that form it.
vibration
mass
properties
sound
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boom
Lose 50 points!
Oops!
×
seesaw
Swap points!
Okay!
×
fairy
Take points!
5
10
15
20
25
×
thief
Give points!
5
10
15
20
25
15
×
Who created the first version of the periodic table?
Mendeleev
Newton
Bohr
Einstein
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15
×
Which element is a metal?
Iron
Oxygen
Helium
Chlorine
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thief
Give points!
5
10
15
20
25
×
rocket
Go to first place!
Okay!
×
rocket
Go to first place!
Okay!
×
baam
Lose 20 points!
Oops!
15
×
What makes a substance a 'pure element'?
It contains many types of atoms
It is always a gas
It is chemically bonded to other elements
It has only one type of atom
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15
×
Normal in reflection refers to:
Standard light measure
Typical path
Average light behavior
Imaginary line perpendicular to surface
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15
×
According to the laws of reflection, the angle of incidence is always:
Less than the angle of reflection
Unrelated
Greater than the angle of reflection
Equal to the angle of reflection
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banana
Go to last place!
Oops!
×
shark
Other team loses 5 points!
Okay!
×
rocket
Go to first place!
Okay!
×
banana
Go to last place!
Oops!
15
×
What is an atom?
Light bouncing off a surface
Bending of light between media
Smallest unit of an element
Transparent mixture of solute and solvent
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15
×
Evaporation and __________ are ways to separate salt from salt water.
crystallization
compound
mass
freezing
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15
×
The greater the change in light speed, the:
Less bending
More bending
No change
Light stops
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