Science Mistake Deck Flashcards
Jack observes the movement of smoke particles in the cell using a microscope. Explain why the particles move around randomly.
The smoke particles are being moved about by collisions with air particles travelling at high speeds.
What is the random and erratic motion of particles
Brownian motion
Rico accidentally releases the smoke from the glass cell. Jack cannot smell the smoke a few meters away. After 30 seconds pass Jack can smell the smoke. Explain why.
The smoke has diffused from an area of high concentration to an area of low concentration.
Calvin has a beaker with ink solution. He uses a method to separate out the water from the ink. Name the separation method he used.
Distillation
Calvin wants to know if the water he collected in the beaker is pure, What test could Calvin do to see if the water is pure?
Measure the boiling point of the water and if its a 100 degrees than its pure water as pure water boils at 100 degrees.
What is a gene bank?
A gene bank is a set of seeds stored not grown
How can gene banks help maintain biodiversity?
If plants go extinct they can be regrown from the seeds stored from the gene bank.
Name problems caused by a diet imbalance
Starvation and deficiency diseases
Formula for weight
Weight = force X gravitational field strength
What is chemical energy?
anything with energy which can be released by a chemical reaction
What is kinetic energy?
anything that moves has energy in the kinetic store.
what i gravitational potential energy?
Anything that can fall has energy in its potential energy store.
What is elastic potential ebergy?
anything stretched has energy in its elastic store
what is the magnetic energy store?
two magnets that attract or repel each other have energy in their magnetic energy storesEl
What is the Electrostatic energy store?
Two electric charges that attract or repel each other have energy in their electrostatic energy stores.
What is the thermal energy store?
everything has some energy in the thermal energy store. the hotter it is the higher the temperature and the more energy.
Are light waves transverse waves or longitudinal waves?
transverse waves
What is the crest of a wave?
the highest part of a wave.
What is the trough of a wave?
the lowest part of the wave.
what us the displacement of a wave.
is how far a point on the wave is from the middle of the line.
what is the amplitude of a wave?
the distance from the middle of the wave to a crest or the trough
Where does light travel the fastest/
In vacums
How are light waves slowed down
by particles
What does a lens do to light?
a lens refracts/bends light
WhaT does a convex lens cause rays of light to do?
A convex lens makes light rays come together and focus to a point by bending them inward
What does the retina do?
images are formed here and in the cells of the retina they are sensitive to light.
What’s the dependant variable
The dependent variable is what you measure in an experiment and it changes
what’s the independent variable
the independent variable changes.
What’s a solvent
“A liquid that dissolves substances.”
