Worksheets8th Grade Science Practice
Total questions: 70
Worksheet time: 56mins
The Planet We Live on is
Sun
Earth
Mars
Saturn
The Sun is a ...
Galaxy
Planet
Star
Universe
The theory that the universe began as a point and has been expanding since is called the _________________.
Point theory
Big l
Big Bang Theory
Big Boom Theory
What shape is the Milky Way?
Elliptical
Irregular
Spiral
Lenticular
Which star stage does our Sun belong to?
Supergiant
Giant
Main Sequence
White Dwarf
Which star stage is generally the HOTTEST?
Supergiant
Giant
Main Sequence
White Dwarf
Which star stage is generally the COOLEST?
Supergiant
Giant
Main Sequence
White Dwarf
Which star stage does our sun belong to?
Supergiant
Giant
Main Sequence
White Dwarf
Which type of star is the coldest?
Yellow Star
Red Star
Orange Star
Blue Star
In the diagram given, what happens as we move from right to left?
Stars get larger
Stars get colder
Stars get hotter
Compared to the rest of the stars, our sun is considered...
Extremely large and cooler
Small with a medium temperature
Medium size with medium temperature
Blue stars are the _____________.
hottest
coolest
smallest
biggest
What determines the color of a star?
Size
Temperature
Composition
They are all the same color
As you move from the bottom to the top of the H-R diagram the __________ changes.
Temperature
Luminosity or Brightness
What is found on the X-axis of an H-R diagram?
Luminosity
(or brightness)
Temperature
Star Size
Distance
Which group is found in the bottom left corner of the H-R Diagram?
Supergiants
Giants
Main Sequence
White Dwarfs
In the diagram given, what happens as we move from right to left?
Stars get larger
Stars get colder
Stars get hotter
Compared to the rest of the stars, our sun is considered...
Extremely large and cooler
Small with a medium temperature
Medium size with medium temperature
Blue stars are the _____________.
hottest
coolest
smallest
biggest
As you move from the bottom to the top of the H-R diagram the __________ changes.
Temperature
Luminosity or Brightness
How many elements are in this chemical formula?
H2SO4
1
2
3
4
What is the total number of atoms in this formula? H2O2
2
4
3
Which of the following is a molecule of a compound?
H2
Cl2
H2O
F2
Which element has the greatest number of atoms? AgNO3
Silver
Gold
Nitrogen
Oxygen
Metals are found on the ______________ side of the periodic table.
nonmetals
left
right
metals
Which element is found in group 2, period 6?
Oxygen (O)
Barium (Ba)
Selenium (Se)
Carbon (C)
How many protons does this element have?
1
20
40
60
How many electrons does this element have?
25
26
29
30
What is this element's atomic number?
10
11
20
20.1797
What is the element's atomic mass?
8
16
30
32.066
How many electrons does this element have?
20
39
40
40.078
Identify this phase of the moon
new moon
full moon
waxing crescent
third quarter
Identify the phase of the moon that is shown
new moon
first quarter
waning gibbous
third quarter
4. Identify the phase of the moon that is shown
new moon
third quarter
waxing crescent
full moon
The Earth completes one of these every 365.25 days
rotation
revolution
What is the definition of force?
the distance that an object moves when it is pushed
how hard we push on something
The REVOLUTION around the Sun and the TILT on the Earth's axis cause what?
Seasons
Rain
Tidal Waves
Moon Phases.
The Earth tilts at ______
90°
23.5°
56.2°
24°
What is the difference between Co and CO?
CO is an element but Co is a compound
Nothing is different. They are the same thing.
CO is two elements and Co is only one element
Co is not a pure substance
Which one is a compound?
Ni
F
Re
NaCl
How many different elements are in the compound?
12
3
24
6
