Matter and Properties
Which term describes anything that has mass and takes up space?
A. Energy
B. Matter
C. Temperature
D. Force
→ Correct: B Matter
Why does deodorant feel cold when sprayed?
A. It condenses
B. It evaporates and absorbs thermal energy
C. It freezes
D. It transfers heat to your skin
B. It evaporates and absorbs thermal energy
Copper is classified as a:
A. Noble gas
B. Nonmetal
C. Metalloid
D. Metal
D. Metal
Which force pulls a marble down a ramp?
A. Friction
B. Normal force
C. Gravity
D. Air resistance
C. Gravity
Which force slows down rolling objects?
A. Gravity
B. Friction
C. Normal force
D. Applied force
B. Friction
Which fact best supports “Air is matter”?
A. It helps us breathe
B. It cannot be seen
C. It has mass
D. It floats balloons for fun
→ Correct: C It has mass
What happens when a liquid is heated?
A. Particles slow down
B. Space between particles decreases
C. Particles move faster
D. It becomes solid
C. Particles move faster
Sodium’s atomic number is 11. P is 4 elements to the right. What is P’s atomic number?
A. 13
B. 14
C. 15
D. 17
C. 15
A motorcycle changes speed from 15 m/s to 24 m/s in 3 s. What is the acceleration?
A. 3 m/s²
B. 5 m/s²
C. 8 m/s²
D. 9 m/s²
A. 3 m/s²
On a force diagram of a rolling ball, the backward arrow represents:
A. Gravity
B. Normal force
C. Friction
D. Applied force
C. Friction
A bottle with water and dirt that settles at the bottom is a:
A. Compound
B. Homogeneous mixture
C. Heterogeneous mixture
D. Substance
C. Heterogeneous mixture
Which reaction absorbs energy?
A. Explosion
B. Combustion
C. Battery current
D. Photosynthesis
D. Photosynthesis
Elements with the same number of valence electrons belong to the same:
A. Row
B. Group
C. Period
D. Block
B. Group
A plane slowing down experiences:
A. Positive velocity
B. Positive acceleration
C. Negative acceleration
D. Stationary motion
C. Negative acceleration
Input force: 40 N
Output force: 160 N
Mechanical advantage = ?
A. 2
B. 3
C. 4
D. 8
C. 4
A sample has mass 100 g and volume 20 cm³. What is its density?
A. 2 g/cm³
B. 4 g/cm³
C. 5 g/cm³
D. 20 g/cm³
C. 5 g/cm³
Balance: 2HCl + Na₂O → xNaCl + H₂O
A. 1
B. 2
C. 3
D. 4
B. 2
An atom has no charge because protons equal:
A. Ions
B. Electrons
C. Neutrons
D. Isotopes
B. Electrons
Velocity change: 16 m/s → 0 m/s in 2 s. Mass = 0.25 kg. What is force?
A. 1 N
B. 2 N
C. 4 N
D. 8 N
B. 2 N
What is the fulcrum of a pair of pliers?
A. The handles
B. The jaws
C. The pivot point
D. The load
C. The pivot point
Which property is unique to each pure substance?
A. Color
B. State
C. Density
D. Temperature
C. Density
Which sentence is Newton’s third law?
A. Forces act in the same direction
B. Equal and opposite forces
C. Elastic collisions always happen
D. Moving objects exert greater force
B. Equal and opposite forces
Why is steel used more widely than iron?
A. It’s heavier
B. It’s softer
C. It’s stronger
D. It’s less safe
C. It’s stronger
On a position-time graph, a horizontal line means:
A. Constant speed
B. Negative acceleration
C. Positive acceleration
D. Not moving
D. Not moving
Forces are balanced when:
A. A force is applied
B. Object speeds up
C. Object slows down
D. Object is at rest
D. Object is at rest