Intro to physical science
What type of energy is transformed during photosynthesis?
solar energy transformed to chemical energy
kinetic energy transformed to electrical energy
chemical energy transformed to solar energy
electrical energy transformed to kinetic
solar energy transformed to chemical energy
What can be concluded if Sample A has a pH of 4 and Sample B has a pH of 6?
Sample A is neutral and Sample B is neutral
Sample A is acidic and Sample B is neutral
Sample A is alkali and Sample B is acidic
Sample A is neutral and Sample B is alkali
Sample A is acidic and Sample B is neutral
What type of energy is required to start the distillation process?
thermal
electric
mechanical
chemical
thermal
Why 2 factors should be controlled experiments?
temperature
time
material
setting
factors such as temperature and material
What occurs when salt is dissolved in water and then distilled using what energy?
chemical
electrical
mechanical
thermal
thermal energy
What happens to water when it freezes?
volume increases and density decreases
volume decreases and density decreases
volume decrease and density increases
volume increases and density increases
volume increases and density decreases
What energy conversion occurs when a solar cell powers a lamp?
solar to light
solar to electric to light
solar to light
heat to light
heat to light to electric
solar to electric to light
Which metal could Martina’s sample be if its mass is 13.5 grams and volume is 5 cm³?
silver
copper
aluminum
iron
aluminum
What is it called when liquid it turns to gas?
boiling point
melting point
sublimation
distillation
boiling point
What is the role of a pH indicator?
determining the acidity of a substance
What is the process called when water changes to ice?
Freezing
What is an example of sublimation?
dry ice changes directly from a solid to gas
dew forms on leaves
ice cream melts
water vapor condenses
dry ice changes directly from a solid to gas?
What happens to the boiling point of water in a pressure cooker?
it increases due to higher pressure
Which two elements in the periodic table have similar characteristics?
Hydrogen and Silicon
Calcium and Barium
Krypton and hydrogen
Calcium and Krypton
Calcium and Barium
What happens to water vapor when it condenses?
forms droplets