Science T3 Flashcards
define the term Chemistry
the branch of science concerned with the substances of which matter is composed, the investigation of their properties and reactions, and the use of such reactions to form new substances.
distinguish chemistry from other branches of science?
Chemistry is a unique branch of science that focuses on the study of matter, its properties, and the changes it undergoes during chemical reactions
What are some connections between chemistry and other science branches?
Chemistry is considered a physical science and is closely related to physics.
WHAT IS A BEAKER USED FOR?
Beaker: Used for holding, mixing, and heating liquids.
WHAT IS A BUSEN BURNER
Bunsen Burner: A gas burner used for heating
what is a test tube used for?
Test Tube: A small glass tube used to hold small amounts of substances for experiments and reactions.
what is a thermometer used for?
Thermometer: Used to measure temperature.
what do you use to weigh?
Balance Scale: Used to measure the mass of substances accurately.
Describe a funnel?
Funnel: Used to pour liquids or powders into containers with a small opening.
How would a stirring rod be used?
Stirring Rod: A glass or plastic rod used to mix chemicals and liquids.
Define and distinguish between the terms observation and inference
An inference is a conclusion or explanation drawn from observations. It involves interpreting the data and applying reasoning. An observation is the act of noting or detecting phenomena through the senses. It involves gathering factual information without any interpretation.
Recall the metric (S.I) units for measuring quantities including mass, length, time and temperature
Length-m
Mass-kg
Time-s/seconds
Temperature-°c
Convert between different orders of magnitudes for metric units
To convert m to cm, multiply by 100.
To convert cm to mm, multiply by 10.
To convert km to m, multiply by 1000.
To convert kg to grams, multiply by 1000.
To convert grams to mg, multiply by 1000.
Identify appropriate instruments to measure mass, length, time and temperature
Tape measure or ruler for lengths
Stopwatch for measuring time
Thermometer for measuring temperature
Balanced scale to measure mass
define matter
It’s space and mass determines if it is matter.
Identify the 3 states of matter
Solid, liquid, and gas
Use a simulation to model the motion of particles in different states of matter
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Compare the energy of particles of the same substance in different states
In terms of relative energy, gas particles have the most energy, solid particles have the least energy and liquid particles are somewhere in between. (All compared at the same temperature.)
how does a state of matter gain or lose energy?
To add or take heat
Explain the process of diffusion in gases
Diffusion is the gradual mixing of gases due to the motion of their component particles
Recall the names of different changes of states
melting, freezing/solidification, vaporisation (evaporation and boiling) condensation, sublimation and deposition.
Define the terms exothermic and endothermic
An exothermic process releases heat, causing the temperature of the immediate surroundings to rise.
An endothermic process absorbs heat and cools the surroundings.
Classify phase changes as endothermic or exothermic
Here is how you would classify the phase changes as endothermic or exothermic: melting, evaporation and sublimation are endothermic processes while freezing, condensation and deposition are exothermic processes
Explain why a scatter graph is an appropriate representation for numerical x and numerical y data
Scatter plots’ primary uses are to observe and show relationships between two numeric variables. The dots in a scatter plot not only report the values of individual data points, but also patterns when the data are taken as a whole.
which state of matter shows the most amount of attraction
solid, has the least amount of energy but most attraction.
