science re Flashcards
(22 cards)
safety in the laboratory
Wearing safety goggles when using chemicals or heat.
Tying back long hair to avoid accidents.
Not eating or drinking in the lab.
Handling chemicals carefully and not touching them with bare hands.
Cleaning up spills immediately and reporting any accidents.
Using equipment properly and following instructions.
What is a logbook and what do you need to put in the logbook?
A logbook is where you write down everything about an experiment. It includes:
The date and time
The aim of the experiment
The materials and method
Observations and results
Any mistakes or things to improve
· What do you conduct in a graph?
The independent variable goes on the x-axis (horizontal).
The dependent variable goes on the y-axis (vertical).
You plot points based on your results and then draw a line or curve to show patterns or trends.
Graphs help identify relationships, such as increases, decreases, or steady changes in data.
· What is an aim, hypothesis? What do you include in an experimental report?
Aim – What you are trying to find out.
Hypothesis – A guess about what will happen.
Experimental report includes: Aim, hypothesis, materials, method, results, discussion, and conclusion.
· what are the following terms:
- independent variable
- dependent variable
- control variable
Independent variable – The thing you change in an experiment.
Dependent variable – The thing you measure.
Control variable – Things you keep the same to make it a fair test.
What is a fair test?
A fair test means only one thing (independent variable) is changed while everything else stays the same.
· How do you dispose of chemicals? Why should you not dispose of some of the chemicals down the sink?
Follow school rules for chemical disposal.
Some chemicals can harm the environment, damage pipes, or react dangerously with water.
· What is the difference between correlation and causation?
Correlation – Two things happen at the same time but might not be connected.
Causation – One thing directly causes another to happen.
Explain the importance of minimising the experimental errors?
Fewer mistakes mean more accurate and reliable results. This helps prove your findings are correct.
be able to interpret data in tables and on line graphs
In tables, look at headings and numbers to find patterns.
In graphs, check how the line moves (going up, down, or staying the same).
· identify and describe directly proportional and inversely proportional relationships on line graphs.
Directly proportional – When one thing increases, the other also increases (a straight upward-sloping line).
Inversely proportional – When one thing increases, the other decreases (a downward-sloping curve).
Wearing safety goggles when using chemicals or heat.
Tying back long hair to avoid accidents.
Not eating or drinking in the lab.
Handling chemicals carefully and not touching them with bare hands.
Cleaning up spills immediately and reporting any accidents.
Using equipment properly and following instructions.
safety in the laboratory
A logbook is where you write down everything about an experiment. It includes:
The date and time
The aim of the experiment
The materials and method
Observations and results
Any mistakes or things to improve
What is a logbook and what do you need to put in the logbook?
The independent variable goes on the x-axis (horizontal).
The dependent variable goes on the y-axis (vertical).
You plot points based on your results and then draw a line or curve to show patterns or trends.
Graphs help identify relationships, such as increases, decreases, or steady changes in data.
· What do you conduct in a graph?
Aim – What you are trying to find out.
Hypothesis – A guess about what will happen.
Experimental report includes: Aim, hypothesis, materials, method, results, discussion, and conclusion.
· What is an aim, hypothesis? What do you include in an experimental report?
Independent variable – The thing you change in an experiment.
Dependent variable – The thing you measure.
Control variable – Things you keep the same to make it a fair test.
· what are the following terms:
- independent variable
- dependent variable
- control variable
A fair test means only one thing (independent variable) is changed while everything else stays the same.
What is a fair test?
Follow school rules for chemical disposal.
Some chemicals can harm the environment, damage pipes, or react dangerously with water.
· How do you dispose of chemicals? Why should you not dispose of some of the chemicals down the sink?
Correlation – Two things happen at the same time but might not be connected.
Causation – One thing directly causes another to happen.
· What is the difference between correlation and causation?
Fewer mistakes mean more accurate and reliable results. This helps prove your findings are correct.
Explain the importance of minimising the experimental errors?
In tables, look at headings and numbers to find patterns.
In graphs, check how the line moves (going up, down, or staying the same).
be able to interpret data in tables and on line graphs
Directly proportional – When one thing increases, the other also increases (a straight upward-sloping line).
Inversely proportional – When one thing increases, the other decreases (a downward-sloping curve).
· identify and describe directly proportional and inversely proportional relationships on line graphs.
