science consolidation 2.0 Flashcards
What happens to the pressure of a gas when it is heated at constant volume?
It increases.
In which two states are the particles randomly arranged?
Particles are randomly arranged in liquid and gas.
In which state are the particles only able to vibrate in a fixed position?
Particles in a solid can only vibrate in an fixed position.
Which state cannot flow from place to place?
Solids cannot flow from place to place.
Particles in which state have no bonds?
Particles in gases have no bonds.
Particles in which state sit in a regular pattern and are held together tightly by bonds?
Particles in solids sit in a regular pattern and are held together tightly by bonds.
What happens to the pressure of a gas when it is heated at constant volume?
When the temperature of a gas is increased, its pressure increases.
When 100 grams of water is boiled, what mass of steam is made?
100 grams of steam would be produced because of the conservation of mass.
What is the definition of solid?
The substance that cannot be compressed.
Is sand a solid?
Yes.
what is the difference between mixture and solution?
Mixture contains two or more substances, which are not chemically combined. A solution contains two substances that are chemically mixed to form a new compound.
Give 3 examples of a solution.
salt water, rubbing alcohol and sugar dissolved in water.
What is the definition of Chromatography?
It is the method of separating colours.
What is the definition of dissolve
When a solid mixes in with a liquid so it is no longer visible.
what is definition of evaporation?
process of removing the liquid from a dissolved solid by warming the mixture until all the liquid turns to gas
what is definition of filtration?
process of separating a mixture of an insoluble solid and liquid e.g sand and water.
what is definition of fractional distillation?
process of separating a mixture of liquids.
what is definition of insoluble?
Its mean when a solid cannot be dissolve.
what is definition of a mixture?
Two or more substance not chemically joined.
what is definition of opaque?
Not possible to see through.
What do the animal cell and plant cell have in common?
They both have a nucleus.
Which part of the cell controls what it does?
Nucleus.
What is the Cytoplasm?
This is a jelly like stuff where most of the chemical reactions occur.
What is the cell membrane?
This is a thin skin around the cell. It holds the cell together and also controls what goes in and out.
What does the plant cell only have?
Chloroplasts.
What is the chloroplasts?
These contain chlorophyll used for photosynthesis.
What is the tissue?
A group of similar cells working together to perform a function.
What is the cell wall?
A rigid outer coating made of cellulose, it gives support.
Why is the nucleus called the control center of the cell?
This is because it is like the cells brain.
Who were the cells discovered by?
They were observed by Hooke in the 1600s.
What is reproduction?
The process of making another one of your species.
Fill in the gaps: When a women has a baby inside her Uterus she is ……….
PREGNANT
How does the baby get food and oxygen?
From the Umbilical cord.
What are secondary sexual characteristics
big penis, body hair and deeper voice
What are the male sex cells called?
Sperm cells.
Where are the male sex cells made?
The male sex cells are made in the testes.
What are the female sex cells called?
The female sex cells are called egg cells. Cilia are cells that line the gas exchange system.
About how long does the menstrual cycle take?
The menstrual cycle takes about 28 days. After five days menstruation has normally stopped.
What is ovulation?
Ovulation is the release of a mature egg cell. Fertilisation is when an egg and sperm join.
What substance passes through the placenta to the baby?
Oxygen travels through the placenta to the baby
What is the purpose of a spoiler on a car?
It creates down-force.
What is g force?
A force acting on your body due to accelerations.
What is the best way to measure force?
Use a force meter.
What is the unit of force called?
Newton
What can we say about the forces on an object that is not moving?
The forces are equal.
What happens to the air resistance on a car as the car goes faster?
It increases.
A force of 4 N acts on a lever 2 m from the pivot. What is the moment?
8n
Is Gravity a contact force?
no
What store of energy does friction always produce?
Friction always produces heat. Only sometimes does it produce gravitational potential energy.
