Homework Practice

Printable assignment

Science Explorer: Force, Friction, Light and Space

Section A: Force, Pressure and Friction

Question 1mcq

Why do school bags often have broad straps?

A.To reduce pressure on the shoulders

B.To make the bag smaller

C.To remove friction completely

D.To increase weight

Question 2mcq

Which surface usually has the greatest friction?

A.Rough concrete

B.Polished tile

C.Wet ice

D.Smooth glass

Question 3mcq

A force can change an object's:

A.Colour only

B.Name only

C.Material always

D.Speed, direction, or shape

Question 4mcq

Why are tyres given grooves?

A.To make them lighter only

B.To make them transparent

C.To increase grip with the road

D.To reduce all pressure

Question 5mcq

Pressure is calculated as:

A.Force divided by area

B.Area divided by force

C.Mass divided by time

D.Force multiplied by colour

Question 6mcq

Why does a sharp knife cut better than a blunt one?

A.It applies force over a smaller area, increasing pressure.

B.It has less metal.

C.It changes the food into liquid.

D.It has no friction.

Section B: Light, Sky and Space

Question 7mcq

A shadow forms when:

A.An opaque object blocks light

B.Air stops moving

C.Sound becomes louder

D.Light passes through clear glass only

Question 8mcq

Which object reflects light most clearly?

A.A plane mirror

B.A rough wall

C.A blackboard

D.A cloth bag

Question 9mcq

Why do we see the Moon shining at night?

A.It absorbs all light

B.It reflects sunlight

C.It produces its own light like the Sun

D.It is made of fire

Question 10mcq

Which planet is known as the Red Planet?

A.Saturn

B.Venus

C.Jupiter

D.Mars

Question 11mcq

Why do stars appear to move across the sky at night?

A.Because stars run around Earth each night

B.Because the Moon pulls them

C.Because Earth rotates

D.Because clouds push them

Question 12mcq

What type of reflection helps us see a clear image in a mirror?

A.Random burning

B.Sound reflection

C.Chemical reflection

D.Regular reflection