Clay tile workers usually make it out of a small stone______ To check whether the walls are in good condition______ This is based on__________________________ It's made on the principle of

Clay tile workers usually make it out of a small stone______ To check whether the walls are in good condition______ This is based on__________________________ It's made on the principle of

Clay tile workers usually use a small stone bolt to make (heavy vertical line) to check whether the wall is (vertical), which is made according to the principle that (the direction of gravity is always vertical downward)

Are different objects subject to the same gravity________ For example:_______________ .
2. Conjecture: what factors may be related to the gravity of an object? & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp;. My conjecture is based on & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp;. 3. Inquiry: the relationship between the gravity of an object and its mass & nbsp;
(1) Laboratory equipment:___________________________________________ (2) What instrument is used to measure the gravity of weights in experiments_____________________ (3) Data record form: & nbsp;
Number of hook codes 1 2 3 4;
Hook weight M / kg;
Hook code gravity g / n
&(4) according to the experimental data collected: & nbsp;
① The ratio of G to m in each experiment is calculated, which is about 0_________ ② Making images with point tracing method & nbsp;
(5) Through calculation and drawing, we can get the relationship between the gravity and the mass of the object_____________ , the expression is___________________ . 
(6) Besides mass, what other factors might gravity be related to? & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp;

Not necessarily the same volume of iron and wood
2. The more vegetables you buy, the heavier you feel
3. Spring dynamometer tick 9.8 proportional to g = mg position
[please click the [adopt as satisfactory answer] button in time [

If scientists want to carry out experiments in the space shuttle, which of the following operations can't be carried out correctly under the condition of "weightlessness"
A. Measure temperature with thermometer B. measure force with spring dynamometer C. measure mass with balance D. measure time with Watch

A. Thermometers measure the temperature of objects. Thermometers work according to the principle of thermal expansion and cold contraction of objects. They have nothing to do with gravity. Under weightlessness conditions, thermometers can measure the temperature of objects, which is not in line with the topic. B. under weightlessness conditions, spring dynamometers can't measure the gravity of objects, but they can also measure other forces, such as tension. C. The essence of balances is that they are not in line with the topic Equal arm lever, if there is no gravity, there is no force at both ends of the lever, no matter how heavy the weight of the object hanging on both ends of the balance, the balance can balance, in weightless conditions, can not use the balance to measure the mass, which is in line with the theme. D. measuring time with a watch has nothing to do with gravity, and the experiment can be carried out normally