WorksheetsCBA2
Total questions: 72
Worksheet time: 36mins
Which of the following is NOT generally considered evidence of a chemical change?
Change in shape
Change in color
Production of an odor
Formation of a precipitate
If you observe a significant temperature change (either hotter or colder) when mixing two chemicals, what does this suggest?
Energy is being released or absorbed, indicating a chemical reaction.
The chemicals are simply dissolving.
The chemicals are changing state.
The chemicals are mixing more efficiently.
Which of the following is a chemical change?
Burning wood
Melting ice
Boiling water
Chopping wood
Which of the following is a physical change?
Dissolving sugar in water
Rusting of iron
Burning of gasoline
Cooking an egg
Rust forming on a bicycle is an example of a chemical change. Which of the following is the best indication that this is a chemical change?
A new substance with a different color is formed.
The bicycle changes shape.
The bicycle gets warmer in the sun.
The bicycle becomes magnetic.
When baking soda is mixed with vinegar, bubbles are produced. This indicates the formation of:
A gas.
A liquid.
A solid.
A precipitate.
Which of the following observations most strongly suggests a chemical reaction has taken place?
A new odor is detected.
A substance changes from solid to liquid.
A substance is crushed into a powder.
A liquid is stirred.
Burning wood is an example of a chemical change because:
New substances like ash and smoke are formed.
The wood changes shape.
The wood gets warmer.
The wood gets smaller.
Which of the following observations most strongly suggests a chemical reaction has occurred?
A new substance with different properties is formed.
The substance changes its state of matter (e.g., from solid to liquid).
The substance is crushed into a powder.
The substance is dissolved in water.
Which of these is the LEAST likely indicator of a chemical change?
Melting ice
Change in odor
Unexpected change in temperature
Change in color
What is a precipitate?
A solid that forms from a solution during a chemical reaction.
A gas that is released during a chemical reaction.
A liquid that changes color during a chemical reaction.
The change in temperature during a chemical reaction.
Which physical property describes how light is reflected from a mineral's surface?
Luster
Streak
Density
Hardness
Tearing a piece of paper is an example of what type of change?
Physical change
Chemical change
Nuclear change
Biological change
Which of these is NOT a physical change?
Baking a cake
Freezing juice to make popsicles
Breaking a glass
Sharpening a pencil
Find the REACTION FORCE....ACTION FORCE: The balloon pushes air down
REACTION FORCE: The air pushes the balloon up.
REACTION FORCE: The air is only pushing out of the balloon.
REACTION FORCE: The air moves out of the balloon.
Find the REACTION FORCE... ACTION FORCE: A book pushing down on a table
REACTION FORCE: The book only pushes down on the table
REACTION FORCE: The table pushes up on the book
REACTION FORCE: Nothing
REACTION FORCE: The table pushes down on the floor
Identify the ACTION FORCE. REACTION FORCE: Tree branch pulls up on apple
ACTION FORCE: Wight of apple pulls down on tree branch
ACTION FORCE: Wind blows tree branch
ACTION FORCE: nothing
ACTION FORCE: Person picks apple from the tree.
Find the ACTION FORCE... REACTION FORCE: The rocket moves up into the sky.
ACTION FORCE: The rocket gas/ flames pushing down
ACTION FORCE: Nothing
ACTION FORCE: someone throws the rocket into the air
ACTION FORCE: Gravity pushes the rocket down
Find the REACTION force.. ACTION FORCE: person pushes water backwards in pool.
REACTION FORCE: The water moves behind them
REACTION FORCE: The water pushes the person forward
REACTION FORCE: the water splashes out of the pool
REACTION FORCE: None
Find the REACTION FORCE.. ACTION FORCE: Person pulls a wagon forward
REACTION FORCE: wagon moves forward
REACTION FORCE: Wagon pulls backwards on persons arm
REACTION FORCE: Gravity pushes the wagon down
Find the REACTION FORCE.. ACTION FORCE: Football is thrown in air and moves forward.
REACTION FORCE: Air pushes backwards on football.
REACTION FORCE: Gravity pulls the football down to ground
REACTION FORCE: Nothing
Find the REACTION FORCE... ACTION FORCE: Person Stubb's toe on table/ pushes table with toe.
REACTION FORCE: Table moves forward
REACTION FORCE: Table pushes down on floor
REACTION FORCE: table pushes back on toe/ toe hurts
Find the REACTION FORCE... ACTION FORCE: Kicking a soccer ball
REACTION FORCE: Soccer ball movers forward
REACTION FORCE: foot moves forward
REACTION FORCE: soccer ball pushes on foot with the same force we kick with
Find the REACTION FORCE....ACTION FORCE: person pushing on floor when doing a plank
REACTION FORCE: Floor pushes back up on persons arms
REACTION FORCE: Gravity pushes down on person
REACTION FORCE: muscles in arms holds person up
When an alien pushes a bench right, what direction does a bench push?
Left
Upward
Backward
Downward
When a frog pushes a roof downward, what direction does a roof push?
Upward
Downward
Forward
Backward
When a turtle pushes a computer left, what direction does a computer push?
Right
Left
Downward
Upward
When a carpenter pushes a pole upward, what direction does a pole push?
Downward
Upward
Forward
Left
A bus hits a bug and the bug splatters on the windshield, which experiences the greater force??
They're the same
The bug
The bus
x
You hit a wall with a stick. The equal but opposite reaction is _____
the wall pushes against the stick
the wall pushes against you
the stick pushes against you
you push against the stick
What causes the balloon to move?
action-reaction forces
electrical forces
friction
gravitational potential energy
The ball hits the wall. Which sentence explains what happens next?
The ball goes through the wall.
The ball moves away from the wall.
The ball moves up the wall.
The ball sticks to the wall.
When a bird lands on a branch, what is the reaction force?
The bird (or object) experiences an equal and opposite push or pull from the other object.
The air resists its motion.
Friction causes it to slow down.
The object moves because of gravity.
What is the formula for force?
F = m/a
F= m x a
F = a/m
F= m+a
Which of the following defines a noncontact force?
A support force exerted on an object by a stable surface.
A force that resists the motion of objects in contact.
A force where one object directly touches another.
A force that one object applies to another without touching it.
Which of the following describes a contact force?
The moon orbiting the Earth.
A compass needle pointing north.
Kicking a soccer ball.
A feather falling to the ground.
What force prevents you from sinking into the ground when standing?
Normal force
Applied force
Why does rubbing your hands together make them warm?
Friction
Magnetism
What force is at work when you kick a soccer ball?
Contact force
Gravity
What makes a paper clip move toward a magnet?
Magnetism
Gravity
Why does a car’s brakes stop it from moving?
Friction
Magnetism
12. Which action is an example of applied force?
A magnet attracting iron nails.
Lifting a box onto a shelf.
A rock falling off a cliff.
A car stopping due to friction.
What happens when you hug a friend?
Contact force
Noncontact force
Why does water flow downhill?
Friction
Gravity
What prevents a book from falling through a desk?
Normal force
Friction
What is friction?
A noncontact force that acts over a distance.
The attractive force that exists between magnets and magnetic materials.
A contact force that resists the sliding motion of two surfaces that are touching.
A force that pulls objects toward the Earth’s surface.
What force is used when pushing a shopping cart?
Applied force
Friction
Why does a magnet attract nails without touching them?
Noncontact
Friction
Why does a fridge magnet stay attached to the refrigerator door?
Magnetism
Gravity
Why does a compass needle point north?
Magnetism
Gravity
Why do your shoes grip the ground when you walk on a dry sidewalk?
Normal force pushing you forward.
Magnetism pulling you downward.
Gravity holding you in place.
Friction between your shoes and the ground.
What force keeps a plate stable on a table?
Normal force
Gravity
Friction
Magnetism
What keeps a cup stable on a table?
Normal force
Gravity
How is an applied force defined?
A force that resists sliding motion between two surfaces.
A noncontact force that exists between objects with mass.
A force that one object directly applies to another by touching it.
A support force exerted by a surface on an object.
What force causes an apple to fall from a tree?
Gravity
Friciton
Why does a sled slow down when sliding on snow?
Friciton
Magnetism
What force is at play when you press the keys on a keyboard?
Contact force
Noncontact force
What force is used when lifting a backpack onto your shoulders?
Applied force
Gravity
Which of the following describes magnetism?
A contact force that keeps objects in place.
A noncontact force between magnets and certain materials.
A force that resists motion between two surfaces.
A force caused by the weight of an object.
Why does a book stop sliding when pushed across a table?
Normal force supports it.
Loading...
Magnetism pulls it to the table.
Gravity pulls it down.
Friction resists its motion
What is happening when you push a chair across the floor?
Applied force
Gravity
Why does a parachutist fall toward the Earth after jumping out of a plane?
Gravity
Friction
Magnetism
Applied force
An object has 16 N of force being applied to the right, 16 N of force being applied to the left, and 4 N of force being applied downward. What is the net force on the object?
36 N
32 N
4 N downward
16 N to the left
A 700.0 kg car is driving with an acceleration of 5.0 m/s2 down the interstate. What is the force required to accelerate the car?
3,500 N
14 N
650 N
0.071 N
The force that pushes upwards on an object falling through the air is
friction
inertia
air resistance
gravity
What are the 2 categories of force?
Ceramic
Plastic
Contact and noncontact
Examples are contact force are:
Magnetism and gravity
Gravity and friction
Friction and pushing
Electrostatic and gravity
What is frictional force?
Force from a person or object
Rock or metal attract magnets
Object moves across a surface
A charge from an object
Normal force is what?
Magnetism
A support force
Gravity
Electrostatic
Which of the following is a non-contact force?
Applied
Magnetic
Normal
Frictional
What is the net force?
20N -->
<--20N
50N -->
80N -->
What is the net force?
<--30N
5N -->
<--25N
<-- 35N
