Which ones a Photosynthesis Reaction?

Carbon Dioxide + Water + Energy (sun) > Carbohydrates + Oxygen

Carbon Dioxide + Water > Carbonic Acid

Which ones are Chemical Reactions?

Sodium + Hydrochloric Acid > Sodium Chloride + Hydrogen

What’s a cellular respiration reaction?

Magnesium + Hydrochloric Acid > Magnesium Chloride + Hydrogen

Metal + Dilute Acid > Salt + Hydrogen

What is the main difference between a neutron and an electron?

An electron has a negative charge and a neutron has a neutral charge

An electron weights about 2000 times less than a neutron

An electron has a neutral charge and a neutron has a negative charge

Which is the correct order of scientists who refined the model of the atom?

J.J Thompson, Ernest Rutherford, Niels Bohr

J.J Thompson, Niels Bohr, Ernest Rutherford

Ernest Rutherford, J.J Thompson, Niels Bohr

Ernest Rutherford, Niels Bohr, J.J Thompson

What is the main difference between photosynthesis and respiration?

Photosynthesis is an endothermic reaction and respiration is an exothermic reaction

Photosynthesis produces carbon dioxide and water and respiration produces oxygen and glucose

Photosynthesis only occurs in plants and respiration only occurs in animals

Photosynthesis happens all day, whereas respiration only happens at night

If a neutral atom of carbon has an atomic number of six, how many electrons would it have?

It depends on what isotope it is

If wood burns in the presence of oxygen, how come trees don’t regularly ignite in flames?

Because trees are made from wet wood

Because oxygen in the air Is bound to nitrogen

Because that kind of combustion reaction requires a large amount of energy to get started

Because oxygen in the air is bound to carbon

Which of the following is not a characteristic of a combustion reaction?

Combustion reactions are always complete

It’s final product include carbon dioxide

It’s product include heat and light

The reactants always include oxygen

When investigating the reactions of metals and acid, which factor would you need to control?

How quickly the reaction took place

Vanessa claims that lemon juice does wonders for her hair. What scientific evidence would support this claim?

Lemon juice is acidic, causing the scales in hair cuticles to lie flat and Vanessa’s hair to look shiny

Lemon juice is alkaline and thus works as a bleach, lightening Vanessa’s hair

Lemon juice is alkaline, causing the scales in hair cuticles to lie flat and Vanessa’s hair to look shiny

Lemon juice is alkaline, causing the scales in hair cuticles to be ruffled and Vanessa’s hair to look shiny

In what way has the energy industry modified its practice to prevent acid rain?

Power stations are removing sulphur dioxide from the waste products that are released in the air

Power stations are removing carbon dioxide from the waste products released in the air

Power stations are removing nitrogen dioxide from the waste products released in the air

Ursula did 50 star jumps and then using a straw blew into a solution of bromothymol blue. What colour is it likely to turn?

It is likely to turn yellow because carbon dioxide is acidic

It is likely to stay blue, as oxygen has a neutral pH

It is likely to stay blue as carbon dioxide has neutral pH

It is likely to turn yellow, as carbon dioxide is basic

Which of the following factors changes in an isotope?

The number of neutrons the atom has

The number of protons the atom has

The number of electrons the atom has

The number of nuclei the atom has

When do radioisotopes form?

When the number of neutrons is much larger the number of protons

When the number of protons is much larger the number of electrons

When the number of protons is much larger the number of neutrons

When the number of neutrons is much larger the number of electrons

What is a disadvantage of irradiating food?

It destroys the vitamins in the food

In what way (PET) scans improved our knowledge of the human body?

PET scans have enabled doctors to observe the functioning body without cutting a person open

PET scans can magnify images over 20 000 times allowing doctors to observe cellular interaction

PET scans have allowed doctors to see how bones heal over time

What is the advantage of using Nuclear Fusion for the production energy over Nuclear Fission?

Nuclear fusion produces less radioactive waste than nuclear fission

Nuclear fusion has an unlimited supply of fusion opposed to nuclear fission which has a limited amount of fuel

Nuclear fusion produces much more energy than nuclear fission

What is the difference between energy produced by an atomic bomb and energy produced by a nuclear reactor?

The energy released in a nuclear reactor is controlled, whereas the energy released in an atomic bomb is not

Atomic bombs can be made from any elements on the right hand side of the periodic table but the nuclear reactors require radioisotopes

Atomic bomb requires radioisotopes, but nuclear reactors can use any elements on the right hand side of the periodic table

The energy released in an atomic bomb is controlled, whereas the energy released in a nuclear reactor is not

Which indicators are we suppose to know?

Bromothymol blue, litmus, methyl orange, phenolphthalein, phenol red & universal indicator

Methyl violet, thymol blue, bromocresol green, thymolphthalein, bromothymol blue & universal indicator

The difference between alpha, beta and gamma nuclear decay?

Gamma-Neutral, Beta-Negative, Alpha-Positive

Alpha-Negative, Beta-Positive, Gamma-Neutral

Isotopes of the same element differ in:

The number of neutrons in their nucleus

The number of protons in their nucleus

What describes an alpha particle?

Helium nuclei made up of two protons and two neutrons

Can be stopped by a sheet or two of paper

What describes a beta particle?

They move at speeds up to nine-tenths the speed of light

Stooped by a sheet of aluminium

High-speed negatively charged electrons

What describes gamma rays?

A type of electromagnetic radiation

Stopped by thick concrete blocks or 2-3 cm of lead

Science Concepts

9th Grade

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46 Qs

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Science Concepts

Quiz

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Science

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9th Grade

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Practice Problem

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Hard

•

NGSS

HS-PS1-8, MS-PS1-5, MS-LS1-7

+10

Standards-aligned

Charles Martinez

FREE Resource

46 questions

Show all answers

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What do acids taste like?

Slippery

Sour

Sweet

Bitter

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What do bases feel like?

Watery

Soapy

Slippery

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What do bases taste like?

Sweet

Soapy

Sour

Bitter

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What indicator has several different colours?

Indicator

Universal Indicator

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What are the 3 main parts of the pH scale?

Aci, Bas & Neu

Acid, Base & Neutral

Acids, Bases & Neutral

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which ones a Neutralisation Reaction?

Acid + Base > Salt + Water

Acid + Metal > Salt + Hydrogen Gas

Carbonate + Acid > Salt + Water + Carbon Dioxide

Which ones a Combustion Reaction?

Carbon Dioxide + Water + Energy (sun) > Carbon Dioxide + Water + Energy

Fuel + Oxygen (hydrocarbon) > Carbon Dioxide + Water + Energy

Oxygen + Carbohydrates > Carbon Dioxide + Water + Energy

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