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Science competition 4

Total questions: 65

Worksheet time: 49mins

Name
Class
Date
1.

Which of the following would it take the most force to move?

a)

a 3-pound ball

b)

a 5 pound ball

c)

a 15 pund ball

d)

a 25 pound ball

2.

Imagine you kick four balls with the same amount of force. Which one will go the farthest?

a)

a 3 pound ball

b)

a 5 pound ball

c)

a 15 pound ball

d)

a 25 pound ball

3.

Which of the following requires forces to move?

a)

a book

b)

a rock

c)

an elephant

d)

all of the above

4.

How does gravity on Earth compare to gravity on the moon?

a)

It is the same

b)

There is more gravity on Earth

c)

There is more gravity on the moon

5.

An example of the force of gravity is-

a)

a rocket flying through space

b)

a ball falling to the ground after it has been thrown

c)

a cloud moving across the sky

d)

the Sun rising

6.

The model shows a toy car and the direction it is traveling. Arrow T represents the direction of a force applied to the moving car. After the force (Arrow T) acts on the car, the car MOST likely will NOT-

a)

change direction

b)

go faster

c)

slow down

d)

stop

7.

Fernando was working on an experiment for science class. He dropped 4 steel balls of different weights from the same height. Her noticed that the balls all reached the ground at the same time. Fernando is probably doing an experiment on the-

a)

force of wind

b)

effect of gravity

c)

states of matter

d)

magnetic force

8.

Henry rolled a car across the floor. He then applied a force to the car. The force was one of the four forces shown by the arrows. Which force will MOST likely increase the car's speed?

a)

Force A

b)

Force B

c)

Force C

d)

Force D

9.

The _______________ is transformed into electrical energy inside the battery.

a)

Chemical energy

b)

Sound energy

c)

Kinetic energy

d)

Sun energy

10.
Which of the following energy transformations occur when a lamp that is plugged into a wall socket is functioning correctly?
a)
Chemical to light
b)
Electrical to chemical
c)
Electrical to light
d)
Chemical to electrical
11.
What is the best example of electrical energy being transformed to thermal energy?
a)
A car driving down the road
b)
Turning on a lamp
c)
A person running
d)
Answering a cell phone
12.
What best describes the energy conversion that takes place in a microwave oven?
a)
electrical to light to thermal
b)
chemical to thermal to light
c)
electrical to thermal to sound
d)
nuclear to thermal to chemical
13.

Energy cannot be created or destroyed.

a)

True

b)

False

14.

Which object shows an energy transformation from electrical to heat energy?

a)
b)
c)
d)
15.

Which activity involved the energy transformation from chemical to potential energy?

a)
b)
c)
d)
16.

What energy transformations take place when a battery-operated radio is in use?

a)

Electrical to chemical to light

b)

Sound to chemical to mechanical

c)

Chemical to electrical to sound

d)

Light to electrical to thermal

17.

Which transformation of energy will occured when you turn on a hair dryer?

a)

electric to kinetic to thermal and sound

b)

chemical to thermal to light and sound

c)

nuclear to electrical to thermal and sound

d)

kinetic to light to thermal and sound

18.

State the correct energy transformation when you turn on a television?

a)

Electrical energy ----> light energy

b)

Electrical energy -----> light energy ----->sound energy

c)

Chemical energy ---->light energy-----> sound energy

d)

Light energy ----> chemical energy -----> sound energy

19.

Which of these household items correctly displays energy transformation of electrical energy into mechanical energy?

a)

Candle

b)

Clothing Iron

c)

Television

d)

Kitchen Mixer

20.

Which transformation of energy occurs in a toaster?

a)

Electrical to kinetic energy

b)

Electrical to heat energy

c)

Thermal to mechanical energy

d)

Solar to electrical energy

21.

Which energy transformation occurs when you rubs your hands together rapidly?

a)

Electrical energy to thermal energy

b)

Electrical energy to chemical energy

c)

Thermal energy to kinetic energy

d)

Kinetic energy to heat energy

22.
What is the best example of electrical energy being transformed to thermal energy?
a)
A car driving down the road
b)
Turning on a lamp
c)
A person running
d)
Answering a cell phone
23.

What makes a short circuit ?

a)

When wire is short

b)

When wire heats up

c)

When battery has finished

d)

When bulb blown up

24.

Which variable is changed from the circuits?

a)

Number of bulb

b)

Number of batteries

c)

Arrangement of bulb

d)

Arrangement of battery

25.

Which of following circuit will NOT light up?

a)
b)
c)
d)
26.

How do you identify a faulty component in a series circuit?

a)

When we add more bulb

b)

When we add more battery

c)

When the bulb does not light up

d)

When the wire is longer

27.

What makes the bulb does not light up?

a)

Because there is no switch

b)

Because there is only 1 battery

c)

Because there is only 1 bulb

d)

Because the wire is not connected well

28.

How do we control the flow of the electricity?

a)

By using bulb

b)

By using battery

c)

By using buzzer

d)

By using switch

29.

The number of crests or troughs that pass by over a certain amount of time

a)

Frequency

b)

sound

c)

amplitude

d)

volume

30.

The distance between one crest or trough to the next

a)

volume

b)

acoustics

c)

sound

d)

wavelength

31.

The distance between the resting point and a crest or trough

a)

acoustics

b)

pitch

c)

amplitude

d)

volume

32.

The study of how sounds travel and how they can be controlled

a)

acoustics

b)

wavelength

c)

pitch

d)

trough

33.

Sound waves travel slowest through a _____

a)

solid

b)

liquid

c)

gas

34.

Sound waves travel fastest through a ______

a)

solid

b)

liquid

c)

gas

35.

What is a tool that makes sounds louder called?

a)

pitch

b)

wavelength

c)

outer ear

d)

amplifier

36.
If light strikes a mirror at a 50⁰ angle, what angle will it come off of the mirror?
a)
50⁰
b)
70⁰
c)
45⁰
d)
30⁰
37.
Which explains why the fork looks different under water?
a)
light can't pass through the glass
b)
the wavelength of light lengthens
c)
the amount of light increases when going through water
d)
light is refracted at an angle
38.
Light bounces when it is 
a)
reflected
b)
absorbed
c)
refracted
39.
Light bends when it is 
a)
refracted
b)
reflected
c)
absorbed
40.

When there is no light, our pupils get ...?

a)

Bigger

b)

Smaller

41.

Which of the following is transparent?

a)

desk

b)

football

c)

show

d)

window

42.

Which of the following is translucent?

a)

window

b)

book

c)

wax paper

d)

human

43.

Which of the following is opaque?

a)

water

b)

wall

c)

window

44.

When light cannot pass through an object, what forms?

a)

reflection

b)

refraction

c)

shadow

45.

When a rainbow is formed outside naturally, what causes the light to refract?

a)

A. Small raindrops

b)

B. Sunlight rays

c)

C. Tiny mirrors

d)

D. Glass prisms

46.

Bola yang menggelinding akan berhenti karena adanya gaya . . .

a)

pegas

b)

gesek

c)

magnet

d)

otot

47.

Perhatikan aktivitas – aktivitas berikut!

(1) Sapi mengangkut gerobak berisi hasil panen

(2) Mengambil buku dari meja

(3) Meletakkan sepatu di rak sepatu

(4) Menekan pompa sumur ke arah bawah

Aktivitas yang menunjukkan gaya berupa tarikan ditunjukkan nomor ….

a)

(1) dan (2)

b)

(1) dan (3)

c)

(2) dan (3)

d)

(3) dan (4)

48.

Suatu hari Doni dan teman-temannya ikut kerja bakti membersihkan sampah yang ada di halaman sekolah. Saat itu, Doni mendapat tugas untuk menampung sampah daun ke dalam kantong plastik besar dan memindahkannya ke lubang pengolahan kompos. Berdasarkan cerita tersebut aktivitas Doni yang menunjukkan gaya berupa dorongan adalah ....

a)

membersihkan sampah di halaman

b)

Doni dan teman-temannya kerja bakti

c)

menampung sampah daun ke dalam kantong plastik besar

d)

memindahkan sampah daun ke lubang pengolahan kompos

49.

Dampak yang terjadi jika magnet yang memiliki kutub utara didekatkan dengan magnet yang berkutub selatan adalah

a)

saling tolak menolak

b)

saling tarik menarik

c)

saling mendorong

d)

saling menjauh

50.

Contoh pengaruh gaya yang dapat merubah arah gerak benda adalah

a)

Mita membuat cobek

b)

Andi mengayu sepeda

c)

Lukman menendang bola ke gawang

d)

Ita menggoreng ikan

51.

Contoh perubahan energi gerak menjadi energi listrik yaitu ....

a)
b)
c)
d)
52.

Perubahan energi pada mobil adalah ....

a)

Energi panas menjadi energi gerak

b)

Energi cahaya menjadi energi gerak

c)

Energi bunyi menjadi energi gerak

d)

Energi kimia menjadi energi gerak

53.

Ini adalah contoh perubahan energi listrik menjadi energi ....

a)

Cahaya

b)

Kimia

c)

Gerak

d)

Bunyi

54.

Radio mengalami perubahan energi listrik menjadi energi ....

a)

Cahaya

b)

Gerak

c)

Bunyi

d)

Kimia

55.

Perubahan energi yang terjadi pada gambar di atas yaitu ....

a)

Energi cahaya menjadi energi panas

b)

Energi cahaya menjadi energi listrik

c)

Energi listrik menjadi energi gerak

d)

Energi listrik menjadi energi kimia

56.

4. Perhatikan beberapa pernyataan berikut ini!

(1) Membutuhkan kabel banyak.

(2) Semua komponen listrik disusun secara bercabang

(3) Digunakan pada instalasi listrik rumah.

(4) Semua komponen listrik disusun secara berderet atau berurutan

Ciri ciri dari rangkaian seri yang tepat ditunjukkan oleh nomor ....

a)

a. (1)

b)

b. (3)

c)

c. (4)

d)

d. (2)

57.

Perhatikanlah rangkaian listrik di atas!

Pernyataan yang benar berkaitan dengan rangkaian tersebut adalah …

a)

Rangkaian listrik tersebut adalah rangkaian paralel karena tersusun vertikal

b)

Rangkaian listrik tersebut adalah rangkaian seri karena tidak memiliki percabangan

c)

Rangkaian listrik tersebut adalah rangkaian paralel karena terdapat percabangan

d)

Rangkaian listrik tersebut adalah rangkaian gabungan seri dan paralel

58.

Untuk memadamkan lampu 3 dan 4, saklar manakah yang harus dibuka?

a)

saklar 1

b)

saklar 2

c)

saklar 3

d)

saklar 3 dan 2

59.

Jika saklar dibuka, keadaan lampu-lampu yang terjadi adalah...

a)

L1, L2 menyala dan L3, L4 padam

b)

L1, L4 menyala dan L2, L3 padam

c)

L1, L3, L4 menyala dan L2 padam

d)

L1, L2, L3 dan L4 padam semuanya

60.

Apabila saklar S1 dibuka dan S2 ditutup, yang terjadi pada lampu-lampu adalah...

a)

L1, L2 padam dan L3, L4, L5, L6 menyala

b)

L1, L2, L3 menyala dan L4, L5, L6 padam

c)

L1, L2, L3, L4 menyala dan L4, L5, L6 padam

d)

L4, L5, L6 menyala dan L1, L2, L3, padam

61.

Saat di dalam air, lumba-lumba dapat berinteraksi antar sesamanya dengan menggunakan bunyi. Hal tersebut membuktikan bahwa....

a)

A. lumba-lumba adalah mamalia air

b)

B. bunyi dapat merambat melalui air

c)

C. bunyi dapat memantul dengan cepat

d)

D. air laut memiliki kadar garam yang cukup tinggi

62.

Antara yang berikut, yang manakah betul tentang sifat cahaya di atas?

a)

Cahaya bergerak lurus

b)

Cahaya boleh dibiaskan

c)

Cahaya boleh diserakkan

d)

Cahaya boleh dipantulkan

63.

Cermin sisi pada kereta, lori dan bas membolehkan pemandunya melihat kenderaan di belakang tanpa perlu menoleh ke belakang.

Apakah prinsip cahaya yang digunakan?

a)

Cahaya dibiaskan

b)

Cahaya dipantulkan

c)

Cahaya dipesongkan

d)

Cahaya bergerak lurus

64.

Antara peralatan berikut, yang manakah menggunakan prinsip pembiasan cahaya?


• Periskop

• Teleskop

• Mikroskop

• Cermin sisi kenderaan

a)

Periskop dan teleskop

b)

Teleskop dan mikroskop

c)

Periskop dan cermin sisi kenderaan

d)

Mikroskop dan cermin sisi kenderaan

65.

sifat bayangan yang ditunjukkan gambar di atas adalah ....

a)

maya, tegak, sama besar

b)

maya, terbalik, sama besar

c)

maya, terbalik, diperkecil

d)

maya, tegak, diperkecil

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