Question

forming a scientific hypothesis when following the scientific method, forming a hypothesis takes place after asking a testable question and conducting research. a hypothesis is an educated guess or prediction about the outcome of an experiment. a hypothesis must be testable and contain an independent and dependent variable. for science, most hypotheses are written as \if ... then ... because\ statements. ex: if compost is added to tomato plants, then the plant will produce more tomatoes, because the plant will have more nutrients to make tomatoes. notice that the if portion of the statement is followed by a change or procedure. this is the independent variable and the cause of the predicted change. the then portion of the statement is the dependent variable and what the scientist would measure or the effect. the because is also an important part of the statement because it is based on observation, research, or previous knowledge about the topic. write a hypothesis using an if...then...because statement and the testable question below. 1. does the type of liquid an ice cube is placed in affect the rate at which it melts? 2. what effect does temperature have on the strength of a magnet? 3. how does exercise affect peoples heart rates? 4. do white chocolate and dark chocolate have the same melting points?

Explanation:

Question 1:

Step1: Identify variables

Independent variable: type of liquid; Dependent variable: rate of ice melting.

Step2: Formulate hypothesis

If an ice cube is placed in different types of liquid (e.g., water, juice, oil), then the rate at which it melts will differ, because different liquids have different thermal conductivities and specific heat capacities that affect heat transfer to the ice.

Step1: Identify variables

Independent variable: temperature; Dependent variable: strength of magnet.

Step2: Formulate hypothesis

If the temperature of a magnet is changed (e.g., heated or cooled), then its strength will change, because temperature can affect the alignment of magnetic domains within the magnet.

Step1: Identify variables

Independent variable: exercise (intensity/duration); Dependent variable: heart rate.

Step2: Formulate hypothesis

If a person engages in exercise, then their heart rate will increase, because exercise requires the body to pump more blood to deliver oxygen to working muscles.

Answer:

If an ice cube is placed in different types of liquid, then the rate at which it melts will differ, because different liquids have different abilities to transfer heat to the ice.

Question 2: