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YR 9 SCIENCE AVECENA

Total questions: 70

Worksheet time: 2hrs 22mins

Name
Class
Date
1.

When we hear the reflection of a sound wave that we produced, this is called

a)

sound amplification

b)

sound transmission

c)

a whisper

d)

an echo

2.

Select all that apply. In order to hear an echo,

a)

the time between the original sound and the reflected sound must be greater than 0.1 s

b)

the time between the original sound and the reflected sound must be less than 0.1 s

c)

the distance between the original sound and the reflected sound must be greater than 17 m

d)

the distance between the original sound and the reflected sound must be less than 17 m

3.

Select all the reasons why someone may not hear an echo when they yell loudly.

a)

The reflected sound is heard too soon, so the brain cannot distinguish between the original sound and the reflected sound.

b)

Sound is absorbed by non-sound-reflective materials in the environment.

c)

The sound intensity of the projected sound wave was too low.

d)

The person is standing in an empty, large building.

4.

What does SONAR stand for?

a)

Science Navigation and Ranging

b)

Sound Navigation and Roaming

c)

Sound Navigation And Ranging

d)

Sound Negativity And Ranging

5.

What is the purpose of SONAR?

a)

Using sound to determine the position of an object.

b)

Using sound to determine the mass of an object.

c)

Using sound to determine the color of an object.

d)

Using sound to determine the magnetic field of an object.

6.

True or false? Submarines and ships are the only things in the world that use SONAR.

a)

True

b)

False

7.

Mr. On is floating in his submarine and is worried about crashing into an underwater cliff. He sends out a SONAR pulse at 1500 m/s. The sound is reflected after 7 s. How far is Mr. On's submarine to the underwater cliff?

a)

10, 500 m

b)

5, 250 m

c)

21,000 m

d)

214 m

8.

What are the laws of reflection of sound?

a)

The incident ray, the reflective ray and the normal at the point of incidence lay on the same plane

b)

The incident ray, the reflective ray and the normal lay may or may not on the same plane

c)

Angle of reflection >Angle of incidence

d)

Angle of reflection =Angle of incidence

9.

How fast does sound travel in the air?

a)

345m/s

b)

332m/s

c)

334m/s

d)

340m/s

10.

loudness is measured in (a)  

11.

An echo occurs when a sound wave is_________.

a)

Transmitted

b)

Absorbed

c)

Reflected

d)

Refracted

12.

When sound is louder what measurement gets bigger?

a)

Amplitude

b)

Crest

c)

Wavelength

d)

Frequency

13.

Give definition for echo

a)

A term used to describe environmentally friendly actions

b)

A repetition of sound caused by reflection of sound waves

14.

Which of the following activities explain the reflection of light?

a)

b)

c)

d)

15.

The _______ and the ________ suspend equal angles with the normal.

a)

Incident ray, reflected ray

b)

Incident angle, reflected angle

c)

Incident ray, reflected angle

d)

Incident angle, reflected ray

16.

What type of obstacle is needed for the reflection of sound?

a)

Polished or rough

b)

Only polished

c)

Only rough

d)

None of the above

17.

The reflected sound is referred to as an

(a)  

18.

For hearing distinct echoes, the minimum distance of the obstacle from the source of sound must be

a)

18.9 m

b)

17.2 m

c)

34.4 m

d)

21.6 m

19.

In stethoscopes the sound of the patient’s heartbeat reaches the doctor’s ears due to

(a)  

20.

Generally the ceilings of concert halls, conference halls and cinema halls are (a)   so that sound after reflection reaches all corners of the hall

21.

Which characteristic is shown in the image?

a)

Organisms grow and develop

b)

Organisms react to stimuli

c)

Organisms can adapt

d)

Organisms use and obtain energy

e)

Organisms are made up of cells

22.

Which characteristic is shown in the image?

a)

Organisms reproduce

b)

Organisms react to stimuli

c)

Organisms can adapt

d)

Organisms use and obtain energy

e)

Organisms are made up of cells

23.

Which characteristic is shown in the image?

a)

Organisms reproduce

b)

Organisms react to stimuli

c)

Organisms can adapt

d)

Organisms use and obtain energy

e)

Organisms are made up of cells

24.

Which characteristic is shown in the image?

a)

Organisms reproduce

b)

Organisms react to stimuli

c)

Organisms can adapt

d)

Organisms use and obtain energy

e)

Organisms are made up of cells

25.

In the image shown, what is the stimulus?

a)

the plant bending towards the light

b)

the light source

26.

In the image shown, what is the response?

a)

the plant bending towards the light

b)

the light source

27.

Which is NOT an example of adaptation?

a)

camels have humps that store fat for extended periods without food

b)

animals have special membranes in the back of their eyes to help them see in the dark

c)

fishes have gills to breath underwater

d)

white pigeons are easily spotted by predators

28.

Choose the statement(s) TRUE for ALL organisms

a)

have cells

b)

can move

c)

grow or develop

d)

use sunlight to make food

e)

have features that help them adapt

29.

Any living thing is called a _____________.

a)

organism

b)

cell

c)

matter

d)

atom

30.

The basic unit of living things are known as ____________.

a)

cells

b)

matter

c)

atom

d)

organism

31.
A worm turns away from light is an example of a worm
a)
reproducing
b)
doing cellular respiration
c)
having cells
d)
responding to its environment
32.
Which of the following characteristics of living things best explain a cat having a litter of kittens?
a)
living things respond to their environment
b)
living things maintain homeostasis
c)
living things reproduce
d)
living things are based on a genetic code
33.
Which of the following characteristics of living things best explains why humans sweat when they get hot?
a)
maintaining a stable internal enviornment
b)
growth and development
c)
using energy
d)
ability to reproduce
34.
Fire is an example of a(n) __________.
a)
something alive
b)
something non-living
35.

Biology is the study of...

a)

living things

b)

gravity

c)

chemical reactions

d)

social relationships

36.

All living things ___ to the environment in order maintain homeostasis.

a)

grow

b)

respond

c)

consume

d)

evolve

37.

Regulating the body in order to keep a constant internal state

a)

stimuli

b)

irritability

c)

homeostasis

d)

survive

38.

_____ is all the chemical processes that happen in an organism, many of which help the organism use and store energy.

a)

virus

b)

metabolism

c)

evolution

d)

response

39.

Identify the class of vertebrate with moist skin

a)

Reptile

b)

Bird

c)

Amphibian

d)

Fish

40.

State the class of vertebrate with dry scaly skin

(a)  

41.

Which class of vertebrate has fins for movement and gills for gas exchange?

a)

Reptile

b)

Fish

c)

Myriapod

d)

Reptile

42.

The animal in the image belongs to which class of vertebrate?

(a)  

43.

State the general term for animals without a backbone

(a)  

44.

Identify the class of invertebrate with a hardened shell (carapace), claws with serrated edges and jointed flexible limbs

a)

Insects

b)

Crustacea

c)

Arachnids

d)

Myriapods

45.

The animal in the image belongs to which class of invertebrate?

(a)  

46.

Which class of invertebrate includes organisms with eight legs and a fused head and thorax?

a)

Myriapods

b)

Molluscs

c)

Insects

d)

Arachnids

47.

The organism in the image belongs to which class of invertebrate?

a)

Insects

b)

Myriapods

c)

Arachnids

d)

Molluscs

48.

Which class of invertebrate includes organisms with a head, thorax and abdomen? They also have antennae and three pairs of legs.

a)

Arachnids

b)

Insects

c)

Crustacea

d)

Amphibians

49.
1. The zebra longwing butterfly is the state insect of Florida. Why is it classified as an invertebrate?
a)
It has wings.
b)
It has antennae.
c)
It does not have a backbone.
d)
It only lives in tropical areas.
50.
2. A scorpion has a segmented body and jointed legs. Which statement about scorpions is true?
a)
A scorpion is an invertebrate and an insect.
b)
A scorpion is a vertebrate and an arthropod.
c)
A scorpion is a vertebrate and an insect.
d)

A scorpion is an inveterebrate and an arthropod.

51.
3. The robber fly is an arthropod. Which of these characteristics is shared by all arthropods?
a)
They all live in water.
b)
They all can fly.
c)
They have a hard, outer covering.
d)
They give birth to live young.
52.
4. Arthropods get their name from their jointed legs. How does the Atlantic ghost crab use its jointed legs? The prefix arthro- means “joint.” The suffix -pod means “foot.”
a)
To move
b)
To breathe
c)
To digest food
d)
To sense its surroundings.
53.
5. The table below describes the features of a specific animal. Which of the following type of animal is described in the table?
a)
arthropod
b)
invertebrate
c)
mammal
d)
vertebrate
54.
6. Which claim is true about arthropods?
a)
All arthropods have 6 legs.
b)
All arthropods have a hard, outer covering.
c)
All arthropods have antenna.
d)
All arthropods can fly.
55.
7. Chris classified the scorpion as an arthropod. Why?
a)
They only have segmented bodies.
b)
They only have a hard outer covering.
c)
They are invertebrates.
d)
All of the above.
56.
8. How are invertebrates different from vertebrates? Provide pick one that also contains an examples of one.
a)
Invertebrates have no backbone, like a dolphin. Vertebrates have a backbone, like a horse.
b)
Invertebrates have no backbone, like a jellyfish. Vertebrates have a backbone, like a horse.
c)
Invertebrates have a backbone, like a dolphin. Vertebrates do not have a backbone, like a horse.
d)
Invertebrates have a backbone, like a jellyfish. Vertebrates have no backbone, like a horse.
57.
9. True or False: All invertebrates are arthropods.
a)
True
b)
False
58.
Which one is an example of an invertebrate that is not an arthropod?
a)
Star fish
b)

Hermit crab

c)
Scorpion
d)
Lobster
59.

A famous scientist first grouped organisms in two main groups: animals and plants. Who was this scientist?

a)

Woese

b)

Whittaker

c)

Linnaeus

60.

Nowadays we group organisms into 5 kingdoms. Who was the scientist that proposed this system?

a)

Woese

b)

Whittaker

c)

Linnaeus

61.

Which of the following is NOT one of the 5 kingdoms:

a)

Animal

b)

Plant

c)

Mammal

d)

Protoctist

e)

Fungi

62.

Which of the following organisms are ONLY unicellular?

a)

Animal

b)

Plant

c)

Fungi

d)

Bacteria

e)

Protoctist

63.

Which of the following can be either uni or multi cellular?

a)

Animal

b)

Plant

c)

Fungi

d)

Bacteria

e)

Protoctist

64.

Which of the following are ONLY multicellular?

a)

Animal

b)

Plant

c)

Fungi

d)

Bacteria

e)

Protoctist

65.

Which of the following have complex cell structure with nucleus?

a)

Animal

b)

Plant

c)

Bacteria

d)

Protoctist

e)

Fungi

66.

Which of the following are/can be autotroph (produce their own food?

a)

Plant

b)

Animal

c)

Protoctist

d)

Fungi

e)

Bacteria

67.

Which is the only kingdom that can never have cell wall?

a)

Animal

b)

Plant

c)

Fungi

d)

Bacteria

e)

Protoctist

68.

What is taxonomy?

a)

The study of living thing

b)

the branch of science concerned with the classification of living organisms

c)

the study of how living things interact with their environment

d)

the branch of science concerned with studying the animal kingdom

69.

What are the 7 levels in order used to classify organisms?

a)

Domain, Kingdom, Species, Class, Order, Family, Genus, Phylum

b)

Kingdom, Domain, Order, Class, Genus, Species, Family, Phylum

c)

Phylum, Order, Kingdom, Species, Domain, Class, Family, Genus

d)

Domain, Kingdom, Phylum, Class, Order, Family, Genus, Species

70.

What is a Platypus classified as?

a)

Amphibian

b)

Mammal

c)

Reptile

d)

Bird

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