4269479
Descripción
Test por Olivia Bamber, actualizado hace más de 1 año
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Creado por Olivia Bamber
hace casi 9 años
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Pregunta 1
Pregunta
What is the function of a cell's nucleus?
Respuesta
-
To act as a brain
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To control the movement of substances into and out of the cell
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To control the activities of the cell
Pregunta 2
Pregunta
What is the function of the ribosomes?
Respuesta
-
To absorb light energy for photosynthesis
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To act as the site for protein synthesis
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To release energy by respiration
Pregunta 3
Pregunta
Metal atoms form...
Respuesta
-
Ribosomes are the site of protein synthesis. Mitochondria are the site of energy release by respiration
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Ribosomes are the site of protein synthesis. Mitochondria are the site of energy release by respiration.
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Positive ions by losing electrons
Pregunta 4
Pregunta
Alveoli is another word for windpipe
Respuesta
- True
- False
Pregunta 5
Pregunta
In what period of its life is our Sun?
Respuesta
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Main sequence
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Major sequence
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Minor sequence
Pregunta 6
Pregunta
A very massive star may explode at the end of its life. This is a....
Respuesta
-
Supernova
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Neutron star
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Black hole
Pregunta 7
Pregunta
Respiration is a chemical reaction that happens in your cells
Respuesta
- True
- False
Pregunta 8
Pregunta
Why does sodium chloride have a lower melting point than magnesium chloride?
Respuesta
-
Its positive ions are smaller and have a smaller charge
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Its positive ions are larger but have a smaller charge
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Its positive ions are smaller but have a larger charge
Pregunta 9
Pregunta
When the diaphragm contracts, it moves down and there is more room, so air rushes into the lungs.
Respuesta
- True
- False
Pregunta 10
Pregunta
Which salt is made when calcium carbonate reacts with hydrochloric acid?
Respuesta
-
Sodium chloride
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Calcium chloride
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Calcium sulfate
Pregunta 11
Pregunta
The Alveoli are shaped like it is to increase the surface area
Respuesta
- True
- False
Pregunta 12
Pregunta
Carbon Dioxide and Water are produced from Respiration
Respuesta
- True
- False
Pregunta 13
Pregunta
The symbol equation for neutralisation is:
Respuesta
-
acid + alkali → salt + water
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H+(aq) + OH-(aq) → H2O(aq)
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H+(aq) + OH-(aq) → H2O(l)
Pregunta 14
Pregunta
A suitcase travels on a conveyor belt. What happens to its momentum if the belt speeds up?
Respuesta
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It increases
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It stays the same
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It decreases
Pregunta 15
Pregunta
What happens to the suitcase's momentum if the conveyor belt goes round a corner?
Respuesta
-
It stays the same
-
It changes
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It is not possible to know
Pregunta 16
Pregunta
What happens to the total momentum of a firework when it explodes?
Respuesta
-
It increases
-
It stays the same
-
It decreases
Pregunta 17
Pregunta
When acids and alkalis dissolve in water...
Respuesta
-
Acids produce hydroxide ions and alkalis produce hydrogen ions
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Acids produce hydrogen ions and alkalis produce hydroxide ions
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Acids and alkalis produce hydrogen ions
Pregunta 18
Pregunta
Energy is released in stars by...
Respuesta
-
Nuclear fusion
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Nuclear fission
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Gravitational attraction
Pregunta 19
Pregunta
Stars form from dust and gas due to...
Respuesta
-
Nuclear fusion
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Nuclear fission
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Gravitational attraction
Pregunta 20
Pregunta
In around four billion years, what will our Sun become?
Respuesta
-
A red dwarf
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A red giant
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A red super giant
Pregunta 21
Pregunta
Which of these is not a natural source of radiation?
Respuesta
-
Food and drink
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Medical x-rays
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Cosmic rays
Pregunta 22
Pregunta
What do radiation badges do?
Respuesta
-
They emit radiation for workers to use
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They monitor the radiation dose a worker receives
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They protect a worker from absorbing radiation
Pregunta 23
Pregunta
The half-life of an isotope is 1 hour. How long will it take for the count rate to fall to one-quarter of the starting rate?
Respuesta
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1 hour
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2 hours
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4 hours
Pregunta 24
Pregunta
Atom X has 7 neutrons and 7 electrons. It decays to form atom Y with 5 neutrons and 5 protons...
Respuesta
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The decay was alpha decay
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The decay was beta decay
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The decay was gamma decay
Pregunta 25
Pregunta
Atom X has 7 neutrons and 7 electrons. It decays to form atom Z with 6 neutrons and 8 protons
Respuesta
-
The decay was alpha decay
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The decay was beta decay
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The decay was gamma decay
Pregunta 26
Pregunta
Organisms such as bacteria and Amoeba are described as [blank_start]unicellular[blank_end] while larger organisms are multicellular
Respuesta
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unicellular
-
multicellular
Pregunta 27
Pregunta
The process of getting oxygen into your lung is [blank_start]breathing[blank_end]
Respuesta
-
breathing
Pregunta 28
Pregunta
A chemical process in your cells is [blank_start]respiration[blank_end]
Respuesta
-
respiration
-
breathing
Pregunta 29
Pregunta
Getting carbon dioxide out of your lungs through [blank_start]breathing[blank_end]
Respuesta
-
breathing
-
respiration
Pregunta 30
Pregunta
[blank_start]Respiration[blank_end] takes place in mitochondria
Respuesta
-
Respiration
Pregunta 31
Pregunta
[blank_start]Respiration[blank_end] is a process that releases energy
Respuesta
-
Respiration
Pregunta 32
Pregunta
Respiration is the process that releases energy from food. Why is this done?
Respuesta
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In mammals - to maintain a constant body temperature
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To allow molecules to diffuse through membranes
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To enable muscles to contract
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To build larger molecules from smaller ones
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In plants - to build up sugars, nitrates and other nutrients into amino acids
Pregunta 33
Respuesta
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Mitochondrion
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Cell Membrane
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Nucleus
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Cyptoplasm
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Nucleolus
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Centrioles
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Golgi Body
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Endoplasmic Reticulum
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Ribosome
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Microtubules
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Lysosome
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