Help students review DNA replication with this Grade 12 biology fill-in-the-blanks worksheet.
Students will identify key concepts such as helicase, DNA polymerase, leading and lagging strands, and semi-conservative replication.
Periodic Table Basics — Practice
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Try these before or after you print the worksheet. The printable asks you to fill in the words. This asks you to keep rows and columns straight — periods go across, groups go down — which is the thing the vocabulary makes easy to muddle.
Question 1 — put them in order
Click these in order, from the smallest thing to the largest.
Proton → atom → element → table. Protons sit inside an atom, atoms of one kind make an element, and the table organises every element there is.
Question 2
Vertical columns on the periodic table are called:
Groups go down. Periods go across. A way to keep them apart: a period is like a line of text, read left to right.
Question 3
Horizontal rows are called:
Periods. This is the pair the worksheet is really testing — groups down, periods across.
Question 4
What does the atomic number tell you?
The number of protons. It is what makes an element that element — change the protons and you have a different element entirely.
Question 5
What is a metalloid?
Both at once. Metalloids sit along the staircase between the metals on the left and the nonmetals on the right, which is why they behave a bit like each.
Question 6 — select all that apply
Select every true statement about the periodic table, then press Check.
Metals left, nonmetals right, and a group behaves similarly. Groups run vertically, the atomic number counts protons, and the rows are not all the same length.
Think about it
Why do elements in the same group behave in similar ways?
The atomic number tells you the protons. What happens if you change that number?
Metals are on the left and nonmetals on the right. Where would you expect to find the metalloids?