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Scientific Evidence and Results

In this worksheet, students will be introduced to a range of methods for collecting scientific evidence and presenting scientific results.

'Scientific Evidence and Results' worksheet

Key stage:  KS 3

Curriculum topic:  Working Scientifically

Curriculum subtopic:  Experimental Skills and Investigations

Difficulty level:  

down

Worksheet Overview

QUESTION 1 of 10

The way scientists collect evidence and present their results depends on the type of experiment they are doing and what they are measuring. In this worksheet you will be taken through various types of results you will come across in Year 7 from biology, chemistry and physics.

 

Cells 

One of the first topics you will do in Year 7 is cells - the building blocks of life. You may have to observe live cells under a microscope. Scientists have to do this in order to determine what type of cell one is, as they may be trying to identify a pathogen - a microorganism that causes disease, for example a germ. You will not deal with microorganisms at school, but other types of cells, like onion cells.

In this investigation, it is required to draw what you can see under the microscope and be able to describe it. The diagram below shows drawings of plant, animal and germ cells. Scientists in big laboratories take pictures of the cells they deal with. You will also have to identify the parts of the cell you can see.

 

 

 

Animal Behaviour

This type of investigation involves observing the behaviour of animals in relation to aggression, courtship or searching for food, over a long period of time. Scientists have to record their observations and write them up in such a way as to help others understand the order and meaning of observed behaviours. Photographs and videos are also helpful. The picture shows a birdwatcher observing a seabird.

 

 

Chemical Reactions and Measurements in Physics

Many chemistry experiments are based on chemical reactions. Scientists may have to measure the temperature of reactions, the time it takes for a reaction to occur, the products of the reaction, the pH of the final products and many other things. Experiments like these are dealt with in other worksheets. Generally, these types of results are recorded on a table and then they are plotted on a graph.

 

Tables and graphs are also used in physics experiments, for example measuring speed, pressure and energy. There is a table and a picture of graphs below, so you can see what they could look like. Bear in mind that there are many different types of graphs.

 

surface speed of toy car (m/s)
carpet
bench 2
rough wood 1.5

 

Georgie is measuring the height of all students in his class. Suggest an appropriate instrument for him to use.

 

30 cm ruler

measuring tape

protractor

Georgie is measuring the height of all students in his class. Suggest an appropriate way for him to present his results.

in a text describing the heights of all students in his class

a photograph

a table of results

Shanice wants to see what onion cells look like. What instrument should she use?

 

telescope

oscilloscope

microscope

What is the best way for Shanice to show her findings on onions cells?

a drawing of the onion cells

a table of results

a graph

Adrian observed how his dog, Rex, behaves when other dogs are around. How should he present his results?

Tick two possible ways.

on a graph

in a table

in a text describing Rex's behaviour at different times

with photographs and a video

with drawings

Maria compares how quickly salt and sugar dissolve in hot water. What is she using to measure the time?

 

a thermometer

a stopclock

a ruler

Maria compares how quickly salt and sugar dissolve in hot water. Choose which of the tables below she is more likely to use to present her results.

 

substance amount (grams)
salt  
sugar  
substance time (seconds)
salt  
sugar  
A B
A

B

Tamil is measuring the speed of a toy car. He wants to determine if friction (drag) affects the speed of the car. Friction is a force that opposes the movement. Suggest where he should measure the speed of the car.

 

on the same surface five times

on the same surface only once

on different surfaces

A group of students gather information about the eye colour of all pupils in their class. What is the best way of presenting their results to show how many students have eyes of each colour?

They should write about it.

They should take pictures.

They should put their results on a graph.

What is the best way of presenting their results to show how many students have eyes of each colour? Choose the best type of graph.

 

A. bar graph B. line graph
A

B

  • Question 1

Georgie is measuring the height of all students in his class. Suggest an appropriate instrument for him to use.

 

CORRECT ANSWER
measuring tape
EDDIE SAYS
The best instrument is the measuring tape. This would enable Georgie to measure the height easily and accurately. A ruler and a protractor would be too short.
  • Question 2

Georgie is measuring the height of all students in his class. Suggest an appropriate way for him to present his results.

CORRECT ANSWER
a table of results
EDDIE SAYS
Georgie should present his results in a table. This would make it easy for others to see the height of all students.
  • Question 3

Shanice wants to see what onion cells look like. What instrument should she use?

 

CORRECT ANSWER
microscope
EDDIE SAYS
Cells of any type can only be viewed under a microscope.
  • Question 4

What is the best way for Shanice to show her findings on onions cells?

CORRECT ANSWER
a drawing of the onion cells
EDDIE SAYS
Shanice should draw the onion cells she viewed under the microscope.
  • Question 5

Adrian observed how his dog, Rex, behaves when other dogs are around. How should he present his results?

Tick two possible ways.

CORRECT ANSWER
in a text describing Rex's behaviour at different times
with photographs and a video
EDDIE SAYS
Adrian should write a text describing Rex's behaviour at different times and accompany this with photographs and even a video.
  • Question 6

Maria compares how quickly salt and sugar dissolve in hot water. What is she using to measure the time?

 

CORRECT ANSWER
a stopclock
EDDIE SAYS
Maria would use a stopclock since this is the only instrument from the options above that can measure time.
  • Question 7

Maria compares how quickly salt and sugar dissolve in hot water. Choose which of the tables below she is more likely to use to present her results.

 

substance amount (grams)
salt  
sugar  
substance time (seconds)
salt  
sugar  
A B
CORRECT ANSWER
B
EDDIE SAYS
Maria would use table B, because this table has time as a heading for the measurement.
  • Question 8

Tamil is measuring the speed of a toy car. He wants to determine if friction (drag) affects the speed of the car. Friction is a force that opposes the movement. Suggest where he should measure the speed of the car.

 

CORRECT ANSWER
on different surfaces
EDDIE SAYS
Tamil should measure the speed of the car on different surfaces.
  • Question 9

A group of students gather information about the eye colour of all pupils in their class. What is the best way of presenting their results to show how many students have eyes of each colour?

CORRECT ANSWER
They should put their results on a graph.
EDDIE SAYS
The best way would be to put their results on a graph. Writing about it would be fine, but not so clear, as the person reading the information would not have an instant visual interpretation of the eye colour of those pupils, which is what the graph offers.
  • Question 10

What is the best way of presenting their results to show how many students have eyes of each colour? Choose the best type of graph.

 

A. bar graph B. line graph
CORRECT ANSWER
A
EDDIE SAYS
A bar graph is the best way to represent this kind of information. The bars would represent each eye colour and the height of the bar would represent the number of pupils that have the specific eye colour.
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