Speed & Velocity
A student pushes a desk across the floor. Which factor affects how fast it moves?
A) The desk’s mass and the force applied
B) The color of the desk
C) The student’s height
D) The room temperature
A – The desk’s mass and the force applied
Which statement best describes acceleration?
A) A change in velocity over time
B) The total distance traveled
C) The direction of an object only
D) The speed of light
A – A change in velocity over time
Water moves up a plant because of which property?
A) Adhesion
B) Cohesion
C) Density
D) Freezing point
A – Adhesion
Vinegar reacts with baking soda to produce bubbles. What is happening?
A) A chemical reaction produces gas
B) Matter is destroyed
C) Mass increases
D) The solid disappears completely
A – A chemical reaction produces gas
Which is true about elements?
A) Made of only one type of atom
B) Can be broken down into simpler substances easily
C) Can only exist as gases
D) Are always compounds
A – Made of only one type of atom
Which example shows balanced forces acting on an object?
A) A book sitting on a table
B) A soccer ball being kicked
C) A car speeding up
D) A person pushing a box
A – A book sitting on a table
A car speeds up from 0 to 60 km/h. What is happening?
A) The car is accelerating
B) The car is at rest
C) The car is balanced
D) The car is moving at constant speed
A – The car is accelerating
Water forms droplets on a leaf. Which property is this?
A) Adhesion
B) Cohesion
C) Capillary action
D) Surface tension
B – Cohesion
A 100 g sample reacts in a closed container. After the reaction, mass is 100 g. Which law is shown?
A) Law of Conservation of Matter
B) Newton’s First Law
C) Law of Gravity
D) Law of Motion
A – Law of Conservation of Matter
Which is a compound?
A) H₂O
B) Oxygen
C) Iron
D) Hydrogen
A – H₂O
A balloon flies around the room when released. Which law explains this?
A) Newton’s 1st Law
B) Newton’s 2nd Law
C) Newton’s 3rd Law – action/reaction
D) Law of Conservation of Matter
C – Newton’s 3rd Law – action/reaction
A runner changes direction but keeps the same speed. Is this acceleration?
A) No, because speed is the same
B) Yes, because velocity changed
C) No, because the direction doesn’t matter
D) Yes, but only if mass changes
B – Yes, because velocity changed
Which property of water allows insects to walk on it?
A) Density
B) Surface tension
C) Cohesion
D) Adhesion
B – Surface tension
Which is a chemical property?
A) Reacts with oxygen
B) Color
C) Shape
D) Density
A – Reacts with oxygen
What is the smallest unit of an element?
A) Molecule
B) Atom
C) Electron
D) Proton
B – Atom
A person pushes a box and it speeds up. Which forces are involved?
A) Gravity and friction
B) Applied force and friction
C) Magnetism and tension
D) Weight and mass
B – Applied force and friction
What must happen for an object to accelerate?
A) A balanced force must act on it
B) A net unbalanced force must act on it
C) It must be at rest
D) It must have constant speed
B – A net unbalanced force must act on it
Which scenario demonstrates both adhesion and cohesion?
A) Water climbing up a paper towel from a puddle
B) Ice melting into water
C) Rain falling from the sky
D) Water freezing into ice
A – Water climbing up a paper towel from a puddle
What happens to matter in a chemical reaction?
A) It disappears
B) It changes form but total mass stays the same
C) It only changes color
D) It doubles
B – It changes form but total mass stays the same
Which scenario shows a physical change?
A) Ice melting into water
B) Rust forming on iron
C) Gas forming from vinegar and baking soda
D) Wood burning
A – Ice melting into water
Two equal forces push on opposite sides of a box. What happens?
A) The box moves twice as fast
B) The box moves at constant speed
C) The box does not move
D) The box speeds up
C – The box does not move
A ball rolls down a hill. Its speed doubles every 2 seconds. What is true?
A) It is at rest
B) It is moving at constant speed
C) It is accelerating
D) It is balanced
C – It is accelerating
How does cohesion and adhesion affect plants?
A) It prevents water from moving
B) It helps move water from roots to leaves
C) It evaporates water
D) It changes the color of leaves
B – It helps move water from roots to leaves
What indicates a chemical reaction has occurred?
A) Gas, color change, temperature change, or formation of a new substance
B) Only change in shape
C) Only melting
D) Only freezing
A – Gas, color change, temperature change, or formation of a new substance
Which scenario shows a chemical change?
A) Iron rusting
B) Ice melting
C) Water evaporating
D) Cutting paper
A – Iron rusting