Random Topic
Which term describes the rate at which an object changes it’s speed?
Acceleration
What is the term used for substances that react together in a chemical reaction?
Reactants
Birds migrating during seasonal changes can be described as which type of adaptation?
Behavioral
What term describes a cloud of gas and dust in outer space
Nebula
In which section of a report do you state an educated guess or prediction about your results?
Hypothesis
What is the term used for atoms with a net charge?
Ion
A reaction of hydrochloric acid and magnesium was observed and then repeated with a higher concentration of acid. Describe the effect of the increased concentration of acid on the reaction.
Increase in reaction rate
Which animal did Darwin study while developing his theory of Natural Selection
Finches
How do the most massive stars finish their life cycle?
Black hole
Define the term ‘independent variable’
The variable in an experiment that is changed by the scientist to see an effect. There should only be one.
Identify the number of protons, neutrons and electrons in an atom of beryllium
P = 4, E = 4, N = 5
Combustion can be classified as which type of reaction?
Exothermic
Who proposed the theory of evolution through acquired characteristics?
Jean-Baptiste Lamarck
Identify a piece of evidence that supports the theory of the big bang
Red shift of galaxies, Cosmic microwave background radiation (CMBR) or the ratio of H and He in our universe
Students measured the effect of different temperatures of water on the dissolving time of a range of headache tablets. What should be the heading in the right-hand column of their table?
time
What is the term used to describe the observable traits of an organism based on it’s genetics?
Phenotype
What is the main element in plastic and what form does the molecule take?
Carbon in very long chains (polymers).
The term describing a part of the body that remains present in a species but is no longer used.
Vestigial structures
‘The apparent change in frequency due to the movement of a source relative to an observed’ is known as the…?
Doppler effect
Students conducted an experiment to see how different surfaces impacted the amount of friction by pulling a mass across a range of surfaces with a spring balance and measuring the force required. Identify the variables for this experiment
The independent variable would be the different surfaces used, the dependent variable would be the amount of friction measured, the controlled variables could be the size of the mass, the mass of the mass, how fast it was pulled etc.
Write the balanced chemical formula for potassium sulfide
K2S
Balance the following chemical equation by identifying any missing coefficients.
FeCl3 + NH4OH ---> Fe(OH)3 + NH4Cl
FeCl3 + 3NH4OH ---> Fe(OH)3 + 3NH4Cl
Structures like a bat’s wing and seal’s flipper which are fundamentally similar but perform different functions are known as
Homologous/analogous structures
Identify all stages of life for a medium mass star in order.
Stellar nebula -> protostar -> medium mass star -> red giant -> white dwarf (with planetary nebula) -> black dwarf
In an experiment to model the greenhouse effect students set up two juice boxes in the sun (on with a glass cover) and measured the temperature change over time. Afterwards, they realized that one of the boxes was larger than the other. Which aspect of their experiment was compromised?
Reliability, Validity or Accuracy
Validity