Subscribe

1st grade · Science · Unit 8 of 11

Hot & Cold Changes

Heat melts, cooks and dries. Some changes go back, some don't.

What your child practices

Practices how heating and cooling change materials, everyday uses of heat such as cooking and drying clothes, and which heat changes can be undone (melting butter) and which cannot (cooking an egg).

Texas Essential Knowledge and Skills (TEKS) teks student expectation: 1.6(B); 1.8(A); 1.8(B) · changes from heating and cooling, uses of heat, and changes that can or cannot be undone

How we explain it

Children can open this short lesson before they practice.

  1. Heat melts, cooks and dries things.
  2. Some changes go back: melted butter can get hard again.
  3. Some do not: a cooked egg can't go back.

Example: Can a cooked egg turn back to raw? Cooking changes the egg for good. Answer: no

Hot & Cold Changes in Texas

In the Texas Essential Knowledge and Skills (TEKS), this is unit 8 of 11 in 1st grade Science, after Parents & Babies and before Soil & Water.

Gradelings describes a child's practice on this unit as Beginning, Approaching, Meeting or Exceeding (Four practice steps). That reflects practice, not a report-card mark: the teacher decides the mark.

Source: Texas Education Agency (TEA)

Sample questions

A taste of this unit. In the app, questions change every time and get easier or harder to match your child.

  1. Question 1

    Can toast turn back into soft bread?

    • Yes, in the freezer
    • No
    • Yes, in water
    • Yes, if you cool it

  2. Question 2

    We warm our hands by a…

    • glass of ice water
    • freezer
    • fan
    • heater

  3. Question 3

    Which keeps food cold?

    • A fridge
    • An oven
    • A stove
    • A toaster

  4. Question 4

    Which uses heat to dry clothes?

    • A freezer
    • A clothes dryer
    • A fan in the snow
    • A cold sink

  5. Question 5

    Water in a pot on the stove gets very hot. It starts to…

    • turn to ice
    • freeze
    • boil
    • turn to sand

  6. Question 6

    Why should we not touch a hot stove?

    • It can burn us
    • It is cold
    • It is wet
    • It is sticky

More 1st grade