Science Skills
The variable that is changed on purpose is:
The independent variable
What is different in a plant and animal cell?
Vacuole, chloroplast, cell wall
Can sound waves generate heat?
Yes, sound waves can generate heat.
What unit is force measured in?
Newton (N)
what happens when iron reacts with oxygen
Rust (iron oxide) forms
Are apparatus and equipment the same thing ?
Yes, apparatus is a set of materials designed for a particular use and equipment is a specific piece of machinery.
Name 2 specialized cells
nerve cell, red blood cell, sperm cell, egg cell
Explain the particle arrangement of solids and how they move.
very closely packed, vibrates in place
What can a force change?
A force can speed up or slow down an object. A force can change the direction in which an object is moving. It can also change the shape.
What compound is made of two hydrogen atoms and one oxygen atoms?
Water (H2O)
What is apparatus used to measure?
Apparatus measures a physical quantity.
what are hereditary and environmental characteristics?
hereditary characteristics are the traits you get from your parents through the genes they pass down to you, their offspring. Environmental characteristics are influenced by your environment.
What are the different methods are there to investigate the rate of reaction?
change in color, energy change (temperature change or light produced), gas production, formation of precipitate and change in properties.
What variable usually comes in the y-axis of the graphs?
The Dependent variable
What is the word equation for neutralization reaction ?
acid + base = salt + water.
What are the 3 rules of graphing ?
Check the data.
Label axes.
Include units.
What is the function of the skeletal system? Give at least 3 functions.
gives the body its shape, allows movement, and protects organs
how do you investigate the rate of reaction?
measure the amount of product formed in a given amount of time
When an object is in motion, what direction does friction act in?
friction acts in a direction opposite to the motion of the object.
What is the result of this equation ? Zinc + hydrochloric acid
zinc chloride + hydrogen gas
can you recall what equipment we used in the last practical? (list at least two)
Measuring cylinder/boiling and ice water/stiring rods/chopped fruits
What is cellular respiration
Cellular respiration is the process that occurs in the mitochondria of organisms (animals and plants) to break down sugar in the presence of oxygen to release energy.
What is sedimentation?
The process of settling down heavier, insoluble particles in an undisturbed mixture solution is known as sedimentation
As light from a star spreads out and weakens, do gaps form between the photons?
The light from a distant star indeed spreads out and weakens as it travels, but this just reduces the wave strength and does not introduce gaps.
What is the balanced equation for photosynthesis ?
6CO2 + 6H2O → C6H12O6+ 6O2