Strand 1 Test Notes Flashcards
Hazard
The danger associated with a particular object/chemical
Risk
The chance of something happening
Base or Bunsen burner
Prevents the Bunsen from toppling
Collar of Bunsen burner
Controls the amount of air allowed into the Bunsen,also responsible for different flame types
Chimney of Bunsen burner
Raises the flame to a suitable height
Air hole of the Bunsen burner
Allows air to enter the bunsen
Variable
Something that you change or changes in a experiment
Categoric data
Described by a label
Discrete data
A while number
Ordered data
Data can be put into order but not given an actual number
Continuous data
Could have any number
Meaning of astronomy
The study of objects beyond the earths atmosphere
What is the force of gravity
An active force which affects anything with mass
Meaning of mass
The amount of matter an object contains
Meaning of weight
The force of gravity acting on an object
Gravitational field strength
-earth exerts a force of 10N on each mass of 1KG
Gravitational field strength on earth
10N/kg
What is the moons gravitational field strength
1/6 of earths gravitational field strength
How can stars be seen
Stars produce their own heat and light by a process called nuclear fusion
How can moons be seen
They reflect light off of planets and stars
How is the moon kept in orbit with earth
By force of gravity and speed
How does the moon affect tides
-gravitational pull
-high tides
-low tides
-sun
-earths tilt
Gravitational pull meaning
The moons gravity pulls on earth’s water,this causes water in the oceans to move,creating tides
High tides
The earths side which is closer to the moon has gravitational pull,which forms a bulge on either side of the earth as both sides are being affected by the moons gravitational pull
How many high tides are there per day
2
How are spring tides formed
When the sun,earth and moon are in line,we get the biggest difference in water depth between high and low tides.This means when there is a high tide,the water springs fourth and therefore it is called a spring tide
How many spring tides are there in a month
2
How long does it take the earth to rotate around its axis once
27.3 days
Meaning of evaporation
Evaporation can occur when particles in a liquid escape to form a vapour
What is a pure substance
Made of only 1 particle
Name the three states of matter
Solid,liquid,gas
What are atoms
Small particles which make up everything in exutencd
What are compounds
2 or more chemical elements chemically joined
What is an element
Made of 1 atom only
What is a mixture
2 or more elements/compound not joined together
What is a molecule
2 or more non metal elements chemically joined together
What is diffusion
When molecules move away from the object and spread out in the air
What is solubility
The mass of solute that can dissolve in the amount of solvent at a temperature
What is a solute
The substance being dissolved
What is a solvent
The substance doing the dissolving
Solution
The mixture of the solvent and a solute
Soluble meaning
A substance which can dissolve in the solvent
