Holidays

Enjoy your holidays!
Teacher

TASK 22: Metals

Metals are very useful and are often used, because they have special properties. Some of them are even called noble metals. But in some cases they can be unpleasant, for instance, there is no warmth in them. Wood, on the other hand, is much more pleasant to touch or to sit upon. Can you find some more advantages or disadvantages of metals?
Teacher

TASK 21: Atoms

"The smallest type of atom, hydrogen, has a diameter of 10^-8 cm." Can there be anything smaller than protons, neutrons, electrons?
Teacher

TASK 20: Simple machines

Work can be very hard and we need a lot of energy for it sometimes. This is why we often use tools and machines. How can a lever make our work easier?
Teacher

TASK 19: Energy

There are many different sources of energy. How would you explain the term renewable energy?
Teacher

Task 18: Forces

Gravity is a force. By the way, it is an action-at-a-distance force.
How would you answer the question: What is the connection between the gravitational force and weight?
Teacher

TASK 17: Team spirit

Do you think teams have any kind of energy? What kind would it be?
Teacher