1.the diagram shows hot water being poured into mug. [open the download to see the diagram.

question; complete the sentence by choosing the correct word from the box each word may be used once or not at all.

words: air , mug , table, water.

sentence; heat energy is being transferred from the to

Forests and meadows are often cut down to make way for farms or large number of new homes. what are some of the elements of ecosystems that are lost when plants in these areas are removed?

Two friends at different locations want to communicate with each other by sending low energy signals. which of the following methods can they use to communicate? a) produce x-rays using colliding electrons and send them to radios, which capture sound b) send messages using infrared radiation, which travel in the form of waves c) send radio waves through intervening media like radio and television d) produce sound waves using microwaves from heated objects

What are the similarities of physical and chemical change ?