Science Term 2

Elements

100

What does the chemical symbol Na stand for?

Sodium 

200

What does the chemical symbol Ag stand for?

Silver

300

What does the chemical symbol Hg stand for?

Mercury 

400

What element is used in the body to make hemoglobin, which is a part of red blood cells, and is vital for making sure oxygen can be transported around the body? 

Iron 

500

What unique property of ________ allows for it to make a huge range of substances such as diamond and graphite? 

Carbon, ability to form up to 4 covalent bonds means it is very versatile and can create a large variety of molecular structures. 

Naming formular

100

Name this compound. 

KI

Potassium Iodide 

200

Name this compound.

CO₂

Carbon Dioxide 

300

Name this compound:

LiOH

Lithium Hydroxide 

400

Name this compound:

Na₂CO₃

Sodium Carbonate 

500

Name this compound: 

NH₄NO₃

Ammonium nitrate 

Type of reactions

100

This is an example of what type of reaction:

Na+Cl ---> NaCl

Synthesis

200

This is an example of what sort of reaction:

O₃ ---> O₂+O

Decomposition 

300

What type of reaction is this:

Al(NO3)3 + H2SO4 ---> Al2(SO4)3 + HNO3

Double replacement 

400

Describe what happens in a synthesis reaction.

To simpler compounds/elements come together to form something new and more complex. 

Eg. K + I ---> KI

500

What products are always produced in a combustion reaction?

CO₂ + H₂O

Genetics

100

What type of cellular replication results in gametes? 

Meiosis 

200

How many chromosomes do humans have?

46

300

DNA is made of Nitrogen rich base pairs and a phosphate/deoxyribose sugar backbone. What base would pair with Adenine (A)

Thymine (T)

400

Brown eyes are dominant to blue eyes. 

If a homozygous individual with Brown eyes paired with a homozygous individual with blue eyes what colour eyes would the offspring have? 

Brown 100%

500

Mitosis is a process of cellular reproduction. It starts with Interphase and ends with cytokinesis. 

What 4 stages are in between? 

Prophase, Metaphase, Anaphase, Telophase

Science Inquiry Skills

100

What tool can you use to measure change in temperature? 

Thermometer 

200

The variable that the scientist changes in an experiment is called? 

The independent variable 

300

A group of students are studying how changing the acidity of a solution effects enzyme activity. 

What is the dependent variable- why? 

The enzyme activity, (this changes as a result of changes in acidity- the acidity is the independent variable as the students change it.)

400

A group of students are testing out how light effects the growth of a plants. They put one plant right next to a window and it gets high amounts of light, the other plant they put in a dark corner it gets low light. 

What is the dependent variable and the independent variable in this scenario?

Independent: the amount of light (proximity to the window) 

dependent: how much the plant grows 

500

How can you make an experiments results more reliable: give at least 3 examples

-increase sample size

-repeating multiple times

-having a control group (placebo) 

-standardise procedures