Year 7 Chapter 1 And 2 Flashcards
(36 cards)
Why is science important and its impact on daily life
Science studies world and how it works. Science helps with medicine and disease, technology, environment from global warming to cloning animal extinction. Even to physics with force and motion determining speed limits and laws
Branches of science
Chemistry, biology plants and animals, physics force, geology study of rocks
Define laboratory
Is where a scientists perform experiments and observations. Labs differ depending on branch of science
What type of equipment can you find in a lab
Differs depending on branch of science, for example astronomer would have a telelscope,
But they would have digital technology to photograph and record data and specialised software to create model
Balances measures mass
Name three types of balances
Beam, electric and spring
Names types of glassware your would find in a lab
Beakers, test tube , watch glass and conical flask
Name two types of heating equipment
Hot plates and Bunsen burner
What do scientist draw in
2D
Name some safety rules in the lab
Safety glasses, tie hair back, use tongs to pick up heated objects, make sure glassware cooled down, move around lab safetly, when Bunsen burner on turn to yellow flame
When you describe the quality of things in words, eg. Olour shape wound is called what
Qualative observations
What is quantative observations
When you describe things in numbers eg temperature, distance, volume
What is the term scientist use for measurements
Units
Example g grams, kg kilograms, ml Millie litre
Scientists communicate their findings and data via reports that can have table and graphs
Name some types Of graphs
Pie graph: used to show proportions
Line: used when 2 sets of measurements
Column and bar: column vertical and bar horizontal and used when their is one set of observations
What are variables and name the 3 types
Are Factors that Can influence what happens in an experiment
Dependent:what you are trying to measure
Independent:trying to test what effect it has on the dependent
Controlled: all other variable not wishing to test that will remain constant
What is an hypothesis
What you think will happen in your experiment
What is the term for a practical investigation that is mainly a performed in labs
Experiment
What is the name for a set of instructions that tell you how t o perform an experiment
Procedure
What are physical properties
Characteristics of a substance for example solid liquid or gas
Substance exists in what 3 forms
Solid liquid gas
Describe a solid
Because particles close and packed together they are imcompressible and hold a fixed shape. When heated ( particles move faster) causes it to expand and when cooled contract
Describe a liquid
Whilst particles are still close they are loosely bonded therefore allowing it flow and take shape of container. It is imcompressable and will also expand when heated and contract when cooled
Describe gas
Particles are spread apart and nothing bonding them together which makes them compressible and at times invisible. Will spread to take shape of the container and will expand and contract
Chemical properties
Is how a substance reacts with another. An example would. E rusting , corroding or combustion
What is the name of the process where by due to bacteria and fungi ( causing chemical reactions) it breaks foe. Substances into a more simpler one
Bio grad ability and and example of biodegradable products are paper, cardboard
